Script toCollect Log File Sync Diagnostic Information (lfsdiag.sql)

mosdoc發表於2016-12-18

Script to Collect Log File Sync Diagnostic Information (lfsdiag.sql) (文件 ID 1064487.1)
In this Document


Purpose

Requirements

Configuring

Instructions

Script
 

Sample Output

References


Applies to:

Oracle Database - Enterprise Edition - Version 10.2.0.4 to 12.1.0.1 [Release 10.2 to 12.1]
Information in this document applies to any platform.

Purpose

This script is intended to provide a user friendly guide to troubleshoot log file sync waits. The script will look at important parameters involved in log file sync waits, log file sync wait histogram data, and the script will look at some of the worst average log file sync times in the active session history data and AWR data and dump information to help determine why those times were the highest. The script will create a file called lfsdiag_<timestamp>.out in your local directory.

See Note: 857576.1 for more information on troubleshooting 'log file sync' waits and see Note: 34592.1 for a definition of 'log file sync' and a list of known bugs. 

Requirements

SQL*Plus - version 10.2.0.4 - 12.1
(can run on earlier versions but not tested and some queries may not work)

Configuring

Simply place the script in a directory and grant execute permission to run. 

Instructions

Launch sqlplus and run the script:

sqlplus '/ as sysdba'
SQL> @lfsdiag.sql

Caution

This sample code is provided for educational purposes only, and is not supported by Oracle Support. It has been tested internally, however, we do not guarantee that it will work for you. Ensure that you run it in your test environment before using.

Script

Paste the script below into a file called lfsdiag.sql and give it execute permissions:

-- NAME: LFSDIAG.SQL
-- ------------------------------------------------------------------------
-- AUTHOR: Michael Polaski - Oracle Support Services
-- ------------------------------------------------------------------------
-- PURPOSE:
-- This script is intended to provide a user friendly guide to troubleshoot
-- log file sync waits. The script will look at important parameters involved
-- in log file sync waits, log file sync wait histogram data, and the script
-- will look at the worst average log file sync times in the active session
-- history data and AWR data and dump information to help determine why those
-- times were the highest. The script will create a file called
-- lfsdiag_<timestamp>.out in your local directory.

set echo off
set feedback off
column timecol new_value timestamp
column spool_extension new_value suffix
select to_char(sysdate,'Mondd_hh24mi') timecol,
'.out' spool_extension from sys.dual;
column output new_value dbname
select value || '_' output
from v$parameter where name = 'db_name';
spool lfsdiag_&&dbname&&timestamp&&suffix
set trim on
set trims on
set lines 140
set pages 100
set verify off
alter session set optimizer_features_enable = '10.2.0.4';

PROMPT LFSDIAG DATA FOR &&dbname&&timestamp
PROMPT Note: All timings are in milliseconds (1000 milliseconds = 1 second)

PROMPT
PROMPT IMPORTANT PARAMETERS RELATING TO LOG FILE SYNC WAITS:
column name format a40 wra
column value format a40 wra
select inst_id, name, value from gv$parameter
where ((value is not null and name like '%log_archive%') or
name like '%commit%' or name like '%event=%' or name like '%lgwr%')
and name not in (select name from gv$parameter where (name like '%log_archive_dest_state%'
and value = 'enable') or name = 'log_archive_format')
order by 1,2,3;

PROMPT
PROMPT ASH THRESHOLD...
PROMPT
PROMPT This will be the threshold in milliseconds for average log file sync
PROMPT times. This will be used for the next queries to look for the worst
PROMPT 'log file sync' minutes. Any minutes that have an average log file
PROMPT sync time greater than the threshold will be analyzed further.
column threshold_in_ms new_value threshold format 999999999.999
select min(threshold_in_ms) threshold_in_ms
from (select inst_id, to_char(sample_time,'Mondd_hh24mi') minute,
avg(time_waited)/1000 threshold_in_ms
from gv$active_session_history
where event = 'log file sync'
group by inst_id,to_char(sample_time,'Mondd_hh24mi')
order by 3 desc)
where rownum <= 10;

PROMPT
PROMPT ASH WORST MINUTES FOR LOG FILE SYNC WAITS:
PROMPT
PROMPT APPROACH: These are the minutes where the avg log file sync time
PROMPT was the highest (in milliseconds).
column minute format a12 tru
column event format a30 tru
column program format a40 tru
column total_wait_time format 999999999999.999
column avg_time_waited format 999999999999.999
select to_char(sample_time,'Mondd_hh24mi') minute, inst_id, event,
sum(time_waited)/1000 TOTAL_WAIT_TIME , count(*) WAITS,
avg(time_waited)/1000 AVG_TIME_WAITED
from gv$active_session_history
where event = 'log file sync'
group by to_char(sample_time,'Mondd_hh24mi'), inst_id, event
having avg(time_waited)/1000 > &&threshold
order by 1,2;

PROMPT
PROMPT ASH LFS BACKGROUND PROCESS WAITS DURING WORST MINUTES:
PROMPT
PROMPT APPROACH: What is LGWR doing when 'log file sync' waits
PROMPT are happening? LMS info may be relevent for broadcast
PROMPT on commit and LNS data may be relevant for dataguard.
PROMPT If more details are needed see the ASH DETAILS FOR WORST
PROMPT MINUTES section at the bottom of the report.
column inst format 999
column minute format a12 tru
column event format a30 tru
column program format a40 wra
select to_char(sample_time,'Mondd_hh24mi') minute, inst_id inst, program, event,
sum(time_waited)/1000 TOTAL_WAIT_TIME , count(*) WAITS,
avg(time_waited)/1000 AVG_TIME_WAITED
from gv$active_session_history
where to_char(sample_time,'Mondd_hh24mi') in (select to_char(sample_time,'Mondd_hh24mi')
from gv$active_session_history
where event = 'log file sync'
group by to_char(sample_time,'Mondd_hh24mi'), inst_id
having avg(time_waited)/1000 > &&threshold and sum(time_waited)/1000 > 1)
and (program like '%LGWR%' or program like '%LMS%' or
program like '%LNS%' or event = 'log file sync')
group by to_char(sample_time,'Mondd_hh24mi'), inst_id, program, event
order by 1,2,3,5 desc, 4;

PROMPT
PROMPT HISTOGRAM DATA FOR LFS AND OTHER RELATED WAITS:
PROMPT
PROMPT APPROACH: Look at the wait distribution for log file sync waits
PROMPT by looking at "wait_time_milli". Look at the high wait times then
PROMPT see if you can correlate those with other related wait events.
column event format a40 wra
select inst_id, event, wait_time_milli, wait_count
from gv$event_histogram
where event in ('log file sync','gcs log flush sync',
'log file parallel write','wait for scn ack',
'log file switch completion','gc cr grant 2-way',
'gc buffer busy','gc current block 2-way') or
event like '%LGWR%' or event like '%LNS%'
order by 2 desc,1,3;

PROMPT
PROMPT ORDERED BY WAIT_TIME_MILLI
select inst_id, event, wait_time_milli, wait_count
from gv$event_histogram
where event in ('log file sync','gcs log flush sync',
'log file parallel write','wait for scn ack',
'log file switch completion','gc cr grant 2-way',
'gc buffer busy','gc current block 2-way')
or event like '%LGWR%' or event like '%LNS%'
order by 3,1,2 desc;

PROMPT
PROMPT REDO WRITE STATS
PROMPT
PROMPT "redo write time" in centiseconds (100 per second)
PROMPT 11.1: "redo write broadcast ack time" in centiseconds (100 per second)
PROMPT 11.2: "redo write broadcast ack time" in microseconds (1000 per millisecond)
column value format 99999999999999999999
column milliseconds format 99999999999999.999
select v.version, ss.inst_id, ss.name, ss.value,
decode(substr(version,1,4),
'11.1',decode (name,'redo write time',value*10,
'redo write broadcast ack time',value*10),
'11.2',decode (name,'redo write time',value*10,
'redo write broadcast ack time',value/1000),
decode (name,'redo write time',value*10)) milliseconds
from gv$sysstat ss, v$instance v
where name like 'redo write%' and value > 0
order by 1,2,3;

PROMPT
PROMPT AWR WORST AVG LOG FILE SYNC SNAPS:
PROMPT
PROMPT APPROACH: These are the AWR snaps where the average 'log file sync'
PROMPT times were the highest.
column begin format a12 tru
column end format a12 tru
column name format a13 tru
select dhs.snap_id, dhs.instance_number inst, to_char(dhs.begin_interval_time,'Mondd_hh24mi') BEGIN,
to_char(dhs.end_interval_time,'Mondd_hh24mi') END,
en.name, se.time_waited_micro/1000 total_wait_time, se.total_waits,
se.time_waited_micro/1000 / se.total_waits avg_time_waited
from dba_hist_snapshot dhs, wrh$_system_event se, v$event_name en
where (dhs.snap_id = se.snap_id and dhs.instance_number = se.instance_number)
and se.event_id = en.event_id and en.name = 'log file sync' and
dhs.snap_id in (select snap_id from (
select se.snap_id, se.time_waited_micro/1000 / se.total_waits avg_time_waited
from wrh$_system_event se, v$event_name en
where se.event_id = en.event_id and en.name = 'log file sync'
order by avg_time_waited desc)
where rownum < 4)
order by 1,2;

PROMPT
PROMPT AWR REDO WRITE STATS
PROMPT
PROMPT "redo write time" in centiseconds (100 per second)
PROMPT 11.1: "redo write broadcast ack time" in centiseconds (100 per second)
PROMPT 11.2: "redo write broadcast ack time" in microseconds (1000 per millisecond)
column stat_name format a30 tru
select v.version, ss.snap_id, ss.instance_number inst, sn.stat_name, ss.value,
decode(substr(version,1,4),
'11.1',decode (stat_name,'redo write time',value*10,
'redo write broadcast ack time',value*10),
'11.2',decode (stat_name,'redo write time',value*10,
'redo write broadcast ack time',value/1000),
decode (stat_name,'redo write time',value*10)) milliseconds
from wrh$_sysstat ss, wrh$_stat_name sn, v$instance v
where ss.stat_id = sn.stat_id
and sn.stat_name like 'redo write%' and ss.value > 0
and ss.snap_id in (select snap_id from (
select se.snap_id, se.time_waited_micro/1000 / se.total_waits avg_time_waited
from wrh$_system_event se, v$event_name en
where se.event_id = en.event_id and en.name = 'log file sync'
order by avg_time_waited desc)
where rownum < 4)
order by 1,2,3;

PROMPT
PROMPT AWR LFS AND OTHER RELATED WAITS FOR WORST LFS AWRs:
PROMPT
PROMPT APPROACH: These are the AWR snaps where the average 'log file sync'
PROMPT times were the highest. Look at related waits at those times.
column name format a40 tru
select se.snap_id, se.instance_number inst, en.name,
se.total_waits, se.time_waited_micro/1000 total_wait_time,
se.time_waited_micro/1000 / se.total_waits avg_time_waited
from wrh$_system_event se, v$event_name en
where se.event_id = en.event_id and (en.name in
('log file sync','gcs log flush sync',
'log file parallel write','wait for scn ack',
'log file switch completion','gc cr grant 2-way',
'gc buffer busy','gc current block 2-way')
or en.name like '%LGWR%' or en.name like '%LNS%')
and se.snap_id in (select snap_id from (
select se.snap_id, se.time_waited_micro/1000 / se.total_waits avg_time_waited
from wrh$_system_event se, v$event_name en
where se.event_id = en.event_id and en.name = 'log file sync'
order by avg_time_waited desc)
where rownum < 4)
order by 1, 6 desc;

PROMPT
PROMPT AWR HISTOGRAM DATA FOR LFS AND OTHER RELATED WAITS FOR WORST LFS AWRs:
PROMPT Note: This query won't work on 10.2 - ORA-942
PROMPT
PROMPT APPROACH: Look at the wait distribution for log file sync waits
PROMPT by looking at "wait_time_milli". Look at the high wait times then
PROMPT see if you can correlate those with other related wait events.
select eh.snap_id, eh.instance_number inst, en.name, eh.wait_time_milli, eh.wait_count
from wrh$_event_histogram eh, v$event_name en
where eh.event_id = en.event_id and
(en.name in ('log file sync','gcs log flush sync',
'log file parallel write','wait for scn ack',
'log file switch completion','gc cr grant 2-way',
'gc buffer busy','gc current block 2-way')
or en.name like '%LGWR%' or en.name like '%LNS%')
and snap_id in (select snap_id from (
select se.snap_id, se.time_waited_micro/1000 / se.total_waits avg_time_waited
from wrh$_system_event se, v$event_name en
where se.event_id = en.event_id and en.name = 'log file sync'
order by avg_time_waited desc)
where rownum < 4)
order by 1,3 desc,2,4;

PROMPT
PROMPT ORDERED BY WAIT_TIME_MILLI
PROMPT Note: This query won't work on 10.2 - ORA-942
select eh.snap_id, eh.instance_number inst, en.name, eh.wait_time_milli, eh.wait_count
from wrh$_event_histogram eh, v$event_name en
where eh.event_id = en.event_id and
(en.name in ('log file sync','gcs log flush sync',
'log file parallel write','wait for scn ack',
'log file switch completion','gc cr grant 2-way',
'gc buffer busy','gc current block 2-way')
or en.name like '%LGWR%' or en.name like '%LNS%')
and snap_id in (select snap_id from (
select se.snap_id, se.time_waited_micro/1000 / se.total_waits avg_time_waited
from wrh$_system_event se, v$event_name en
where se.event_id = en.event_id and en.name = 'log file sync'
order by avg_time_waited desc)
where rownum < 4)
order by 1,4,2,3 desc;

PROMPT
PROMPT ASH DETAILS FOR WORST MINUTES:
PROMPT
PROMPT APPROACH: If you cannot determine the problem from the data
PROMPT above, you may need to look at the details of what each session
PROMPT is doing during each 'bad' snap. Most likely you will want to
PROMPT note the times of the high log file sync waits, look at what
PROMPT LGWR is doing at those times, and go from there...
column program format a45 wra
column sample_time format a25 tru
column event format a30 tru
column time_waited format 999999.999
column p1 format a40 tru
column p2 format a40 tru
column p3 format a40 tru
select sample_time, inst_id inst, session_id, program, event, time_waited/1000 TIME_WAITED,
p1text||': '||p1 p1,p2text||': '||p2 p2,p3text||': '||p3 p3
from gv$active_session_history
where to_char(sample_time,'Mondd_hh24mi') in (select
to_char(sample_time,'Mondd_hh24mi')
from gv$active_session_history
where event = 'log file sync'
group by to_char(sample_time,'Mondd_hh24mi'), inst_id
having avg(time_waited)/1000 > &&threshold)
and time_waited > 0.5
order by 1,2,3,4,5;

select to_char(sysdate,'Mondd hh24:mi:ss') TIME from dual;

spool off

PROMPT
PROMPT OUTPUT FILE IS: lfsdiag_&&dbname&&timestamp&&suffix
PROMPT

Sample Output

LFSDIAG DATA FOR DBM_Oct10_1307
Note: All timings are in milliseconds (1000 milliseconds = 1 second)

IMPORTANT PARAMETERS RELATING TO LOG FILE SYNC WAITS:

   INST_ID NAME                                     VALUE
---------- ---------------------------------------- ----------------------------------------
         1 commit_logging
         1 commit_point_strength                    1
         1 commit_wait
         1 commit_write
         1 log_archive_local_first                  TRUE
         1 log_archive_max_processes                4
         1 log_archive_min_succeed_dest             1
         1 log_archive_start                        FALSE
         1 log_archive_trace                        0
         2 commit_logging
         2 commit_point_strength                    1
         2 commit_wait
         2 commit_write
         2 log_archive_local_first                  TRUE
         2 log_archive_max_processes                4
         2 log_archive_min_succeed_dest             1
         2 log_archive_start                        FALSE
         2 log_archive_trace                        0

ASH THRESHOLD...

This will be the threshold in milliseconds for average log file sync
times. This will be used for the next queries to look for the worst
'log file sync' minutes. Any minutes that have an average log file
sync time greater than the threshold will be analyzed further.

THRESHOLD_IN_MS
---------------
           .000

ASH WORST MINUTES FOR LOG FILE SYNC WAITS:

APPROACH: These are the minutes where the avg log file sync time
was the highest (in milliseconds).

MINUTE          INST_ID EVENT                            TOTAL_WAIT_TIME      WAITS   AVG_TIME_WAITED
------------ ---------- ------------------------------ ----------------- ---------- -----------------
Oct01_0111            2 log file sync                               .807          1              .807
Oct02_0600            2 log file sync                              4.308          1             4.308
Oct09_0043            2 log file sync                            999.805          1           999.805

ASH LFS BACKGROUND PROCESS WAITS DURING WORST MINUTES:

APPROACH: What is LGWR doing when 'log file sync' waits
are happening? LMS info may be relevent for broadcast
on commit and LNS data may be relevant for dataguard.
If more details are needed see the ASH DETAILS FOR WORST
MINUTES section at the bottom of the report.

MINUTE       INST PROGRAM                                  EVENT                            TOTAL_WAIT_TIME      WAITS   AVG_TIME_WAITED
------------ ---- ---------------------------------------- ------------------------------ ----------------- ---------- -----------------
Oct02_0600      2 oracle@racnode1.us.oracle.com (LGWR)    log file parallel write                    4.088          1             4.088
Oct02_0600      2 oracle@racnode1.us.oracle.com (M000)    log file sync                              4.308          1             4.308
Oct09_0043      2 oracle@racnode1.us.oracle.com (LGWR)    log file parallel write                 1000.738          1          1000.738
Oct09_0043      2 sqlplus@racnode1.us.oracle.com (TNS V1- log file sync                            999.805          1           999.805
                  V3)


HISTOGRAM DATA FOR LFS AND OTHER RELATED WAITS:

APPROACH: Look at the wait distribution for log file sync waits
by looking at "wait_time_milli". Look at the high wait times then
see if you can correlate those with other related wait events.

   INST_ID EVENT                                    WAIT_TIME_MILLI WAIT_COUNT
---------- ---------------------------------------- --------------- ----------
         2 wait for scn ack                                       1          0
         2 wait for scn ack                                       2          0
         2 wait for scn ack                                       4          0
         2 wait for scn ack                                       8          1
         1 log file sync                                          1      10247
         1 log file sync                                          2        435
         1 log file sync                                          4        122
         1 log file sync                                          8         33
         1 log file sync                                         16          4
         1 log file sync                                         32          2
         1 log file sync                                         64          2
         1 log file sync                                        128          1
         1 log file sync                                        256          1
         1 log file sync                                        512          0
         1 log file sync                                       1024          5
         1 log file sync                                       2048          0
         1 log file sync                                       4096          0
         1 log file sync                                       8192          1
         2 log file sync                                          1       7821
         2 log file sync                                          2        492
         2 log file sync                                          4        173
         2 log file sync                                          8        120
         2 log file sync                                         16         22
         2 log file sync                                         32         16
         2 log file sync                                         64          3
         2 log file sync                                        128          3
         2 log file sync                                        256          0
         2 log file sync                                        512          0
         2 log file sync                                       1024          7
         2 log file sync                                       2048          0
         2 log file sync                                       4096          1
         1 log file switch completion                             1          0
         1 log file switch completion                             2          0
         1 log file switch completion                             4          0
         1 log file switch completion                             8          0
         1 log file switch completion                            16          0
         1 log file switch completion                            32          0
         1 log file switch completion                            64          0
         1 log file switch completion                           128          1
         2 log file switch completion                             1          0
         2 log file switch completion                             2          0
         2 log file switch completion                             4          0
         2 log file switch completion                             8          0
         2 log file switch completion                            16          1
         2 log file switch completion                            32          0
         2 log file switch completion                            64          1
         2 log file switch completion                           128          1
         1 log file parallel write                                1     273379
         1 log file parallel write                                2       2812
         1 log file parallel write                                4       2161
         1 log file parallel write                                8       8603
         1 log file parallel write                               16       2822
         1 log file parallel write                               32        484
         1 log file parallel write                               64        212
         1 log file parallel write                              128         50
         1 log file parallel write                              256         10
         1 log file parallel write                              512          0
         1 log file parallel write                             1024          7
         1 log file parallel write                             2048          0
         1 log file parallel write                             4096          0
         1 log file parallel write                             8192          1
         2 log file parallel write                                1     890229
         2 log file parallel write                                2       4392
         2 log file parallel write                                4       2274
         2 log file parallel write                                8       8688
         2 log file parallel write                               16       3649
         2 log file parallel write                               32        704
         2 log file parallel write                               64        235
         2 log file parallel write                              128         51
         2 log file parallel write                              256          3
         2 log file parallel write                              512          2
         2 log file parallel write                             1024         14
         2 log file parallel write                             2048          1
         2 log file parallel write                             4096          0
         2 log file parallel write                             8192          1
         2 log file parallel write                            16384          0
         2 log file parallel write                            32768          0
         2 log file parallel write                            65536          0
         2 log file parallel write                           131072          2
         2 log file parallel write                           262144          1
         1 gcs log flush sync                                     1      34429
         1 gcs log flush sync                                     2       1378
         1 gcs log flush sync                                     4        640
         1 gcs log flush sync                                     8        254
         1 gcs log flush sync                                    16        953
         2 gcs log flush sync                                     1     106292
         2 gcs log flush sync                                     2       3693
         2 gcs log flush sync                                     4        401
         2 gcs log flush sync                                     8        289
         2 gcs log flush sync                                    16       1825
         1 gc current block 2-way                                 1     183987
         1 gc current block 2-way                                 2         53
         1 gc current block 2-way                                 4          9
         1 gc current block 2-way                                 8          6
         1 gc current block 2-way                                16          8
         1 gc current block 2-way                                32          8
         1 gc current block 2-way                                64          0

   INST_ID EVENT                                    WAIT_TIME_MILLI WAIT_COUNT
---------- ---------------------------------------- --------------- ----------
         1 gc current block 2-way                               128          0
         1 gc current block 2-way                               256          0
         1 gc current block 2-way                               512          0
         1 gc current block 2-way                              1024          0
         1 gc current block 2-way                              2048          0
         1 gc current block 2-way                              4096          0
         1 gc current block 2-way                              8192          0
         1 gc current block 2-way                             16384          0
         1 gc current block 2-way                             32768          0
         1 gc current block 2-way                             65536          0
         1 gc current block 2-way                            131072          0
         1 gc current block 2-way                            262144          0
         1 gc current block 2-way                            524288          0
         1 gc current block 2-way                           1048576          1
         2 gc current block 2-way                                 1     267712
         2 gc current block 2-way                                 2         59
         2 gc current block 2-way                                 4         20
         2 gc current block 2-way                                 8         18
         2 gc current block 2-way                                16         33
         2 gc current block 2-way                                32         75
         2 gc current block 2-way                                64         16
         2 gc current block 2-way                               128          4
         2 gc current block 2-way                               256          1
         1 gc cr grant 2-way                                      1      24433
         1 gc cr grant 2-way                                      2         14
         1 gc cr grant 2-way                                      4          4
         1 gc cr grant 2-way                                      8          5
         1 gc cr grant 2-way                                     16          2
         2 gc cr grant 2-way                                      1      18443
         2 gc cr grant 2-way                                      2         61
         2 gc cr grant 2-way                                      4         34
         2 gc cr grant 2-way                                      8         17
         2 gc cr grant 2-way                                     16         16
         2 gc cr grant 2-way                                     32         23
         2 gc cr grant 2-way                                     64         16
         2 gc cr grant 2-way                                    128         11
         1 LGWR wait for redo copy                                1      40880
         1 LGWR wait for redo copy                                2          7
         1 LGWR wait for redo copy                                4          1
         1 LGWR wait for redo copy                                8          1
         1 LGWR wait for redo copy                               16          2
         1 LGWR wait for redo copy                               32          0
         1 LGWR wait for redo copy                               64          1
         2 LGWR wait for redo copy                                1      78781
         2 LGWR wait for redo copy                                2          5
         2 LGWR wait for redo copy                                4          6
         2 LGWR wait for redo copy                                8          5
         2 LGWR wait for redo copy                               16          3
         2 LGWR wait for redo copy                               32         10
         2 LGWR wait for redo copy                               64          7
         2 LGWR wait for redo copy                              128          1

ORDERED BY WAIT_TIME_MILLI

   INST_ID EVENT                                    WAIT_TIME_MILLI WAIT_COUNT
---------- ---------------------------------------- --------------- ----------
         1 log file sync                                          1      10247
         1 log file switch completion                             1          0
         1 log file parallel write                                1     273379
         1 gcs log flush sync                                     1      34429
         1 gc current block 2-way                                 1     183987
         1 gc cr grant 2-way                                      1      24433
         1 LGWR wait for redo copy                                1      40880
         2 wait for scn ack                                       1          0
         2 log file sync                                          1       7821
         2 log file switch completion                             1          0
         2 log file parallel write                                1     890229
         2 gcs log flush sync                                     1     106292
         2 gc current block 2-way                                 1     267712
         2 gc cr grant 2-way                                      1      18443
         2 LGWR wait for redo copy                                1      78781
         1 log file sync                                          2        435
         1 log file switch completion                             2          0
         1 log file parallel write                                2       2812
         1 gcs log flush sync                                     2       1378
         1 gc current block 2-way                                 2         53
         1 gc cr grant 2-way                                      2         14
         1 LGWR wait for redo copy                                2          7
         2 wait for scn ack                                       2          0
         2 log file sync                                          2        492
         2 log file switch completion                             2          0
         2 log file parallel write                                2       4392
         2 gcs log flush sync                                     2       3693
         2 gc current block 2-way                                 2         59
         2 gc cr grant 2-way                                      2         61
         2 LGWR wait for redo copy                                2          5
         1 log file sync                                          4        122
         1 log file switch completion                             4          0
         1 log file parallel write                                4       2161
         1 gcs log flush sync                                     4        640
         1 gc current block 2-way                                 4          9
         1 gc cr grant 2-way                                      4          4
         1 LGWR wait for redo copy                                4          1
         2 wait for scn ack                                       4          0
         2 log file sync                                          4        173
         2 log file switch completion                             4          0
         2 log file parallel write                                4       2274
         2 gcs log flush sync                                     4        401
         2 gc current block 2-way                                 4         20
         2 gc cr grant 2-way                                      4         34
         2 LGWR wait for redo copy                                4          6
         1 log file sync                                          8         33
         1 log file switch completion                             8          0
         1 log file parallel write                                8       8603
         1 gcs log flush sync                                     8        254
         1 gc current block 2-way                                 8          6
         1 gc cr grant 2-way                                      8          5
         1 LGWR wait for redo copy                                8          1
         2 wait for scn ack                                       8          1
         2 log file sync                                          8        120
         2 log file switch completion                             8          0
         2 log file parallel write                                8       8688
         2 gcs log flush sync                                     8        289
         2 gc current block 2-way                                 8         18
         2 gc cr grant 2-way                                      8         17
         2 LGWR wait for redo copy                                8          5
         1 log file sync                                         16          4
         1 log file switch completion                            16          0
         1 log file parallel write                               16       2822
         1 gcs log flush sync                                    16        953
         1 gc current block 2-way                                16          8
         1 gc cr grant 2-way                                     16          2
         1 LGWR wait for redo copy                               16          2
         2 log file sync                                         16         22
         2 log file switch completion                            16          1
         2 log file parallel write                               16       3649
         2 gcs log flush sync                                    16       1825
         2 gc current block 2-way                                16         33
         2 gc cr grant 2-way                                     16         16
         2 LGWR wait for redo copy                               16          3
         1 log file sync                                         32          2
         1 log file switch completion                            32          0
         1 log file parallel write                               32        484
         1 gc current block 2-way                                32          8
         1 LGWR wait for redo copy                               32          0
         2 log file sync                                         32         16
         2 log file switch completion                            32          0
         2 log file parallel write                               32        704
         2 gc current block 2-way                                32         75
         2 gc cr grant 2-way                                     32         23
         2 LGWR wait for redo copy                               32         10
         1 log file sync                                         64          2
         1 log file switch completion                            64          0
         1 log file parallel write                               64        212
         1 gc current block 2-way                                64          0
         1 LGWR wait for redo copy                               64          1
         2 log file sync                                         64          3
         2 log file switch completion                            64          1
         2 log file parallel write                               64        235
         2 gc current block 2-way                                64         16
         2 gc cr grant 2-way                                     64         16
         2 LGWR wait for redo copy                               64          7
         1 log file sync                                        128          1

   INST_ID EVENT                                    WAIT_TIME_MILLI WAIT_COUNT
---------- ---------------------------------------- --------------- ----------
         1 log file switch completion                           128          1
         1 log file parallel write                              128         50
         1 gc current block 2-way                               128          0
         2 log file sync                                        128          3
         2 log file switch completion                           128          1
         2 log file parallel write                              128         51
         2 gc current block 2-way                               128          4
         2 gc cr grant 2-way                                    128         11
         2 LGWR wait for redo copy                              128          1
         1 log file sync                                        256          1
         1 log file parallel write                              256         10
         1 gc current block 2-way                               256          0
         2 log file sync                                        256          0
         2 log file parallel write                              256          3
         2 gc current block 2-way                               256          1
         1 log file sync                                        512          0
         1 log file parallel write                              512          0
         1 gc current block 2-way                               512          0
         2 log file sync                                        512          0
         2 log file parallel write                              512          2
         1 log file sync                                       1024          5
         1 log file parallel write                             1024          7
         1 gc current block 2-way                              1024          0
         2 log file sync                                       1024          7
         2 log file parallel write                             1024         14
         1 log file sync                                       2048          0
         1 log file parallel write                             2048          0
         1 gc current block 2-way                              2048          0
         2 log file sync                                       2048          0
         2 log file parallel write                             2048          1
         1 log file sync                                       4096          0
         1 log file parallel write                             4096          0
         1 gc current block 2-way                              4096          0
         2 log file sync                                       4096          1
         2 log file parallel write                             4096          0
         1 log file sync                                       8192          1
         1 log file parallel write                             8192          1
         1 gc current block 2-way                              8192          0
         2 log file parallel write                             8192          1
         1 gc current block 2-way                             16384          0
         2 log file parallel write                            16384          0
         1 gc current block 2-way                             32768          0
         2 log file parallel write                            32768          0
         1 gc current block 2-way                             65536          0
         2 log file parallel write                            65536          0
         1 gc current block 2-way                            131072          0
         2 log file parallel write                           131072          2
         1 gc current block 2-way                            262144          0
         2 log file parallel write                           262144          1
         1 gc current block 2-way                            524288          0
         1 gc current block 2-way                           1048576          1

REDO WRITE STATS

"redo write time" in centiseconds (100 per second)
11.1: "redo write broadcast ack time" in centiseconds (100 per second)
11.2: "redo write broadcast ack time" in microseconds (1000 per millisecond)

VERSION              INST_ID NAME                                                     VALUE        MILLISECONDS
----------------- ---------- ---------------------------------------- --------------------- -------------------
11.2.0.3.0                 1 redo write broadcast ack count                             676
11.2.0.3.0                 1 redo write broadcast ack time                        144093133          144093.133
11.2.0.3.0                 1 redo write time                                          22105          221050.000
11.2.0.3.0                 1 redo writes                                             290541
11.2.0.3.0                 2 redo write broadcast ack count                            1000
11.2.0.3.0                 2 redo write broadcast ack time                          3519883            3519.883
11.2.0.3.0                 2 redo write time                                          93028          930280.000
11.2.0.3.0                 2 redo writes                                             910246

AWR WORST AVG LOG FILE SYNC SNAPS:

APPROACH: These are the AWR snaps where the average 'log file sync'
times were the highest.

   SNAP_ID INST BEGIN        END          NAME            TOTAL_WAIT_TIME TOTAL_WAITS   AVG_TIME_WAITED
---------- ---- ------------ ------------ ------------- ----------------- ----------- -----------------
     12002    1 Jun24_1715   Jun24_1730   log file sync         44087.518         672            65.606
     12002    2 Jun24_1715   Jun24_1730   log file sync        988001.648      414752             2.382
     12002    3 Jun24_1715   Jun24_1730   log file sync          3726.670        1349             2.763
     12002    4 Jun24_1715   Jun24_1730   log file sync       4747362.294     1448060             3.278
     12003    1 Jun24_1730   Jun24_1745   log file sync         44140.364         710            62.170
     12003    2 Jun24_1730   Jun24_1745   log file sync        988806.288      414787             2.384
     12003    3 Jun24_1730   Jun24_1745   log file sync          4200.097        1658             2.533
     12003    4 Jun24_1730   Jun24_1745   log file sync       4747647.013     1448304             3.278
     12004    1 Jun24_1745   Jun24_1800   log file sync         44490.880         783            56.821
     12004    2 Jun24_1745   Jun24_1800   log file sync        988883.165      414883             2.384
     12004    3 Jun24_1745   Jun24_1800   log file sync          4724.043        2057             2.297
     12004    4 Jun24_1745   Jun24_1800   log file sync       4747733.174     1448434             3.278

AWR REDO WRITE STATS

"redo write time" in centiseconds (100 per second)
11.1: "redo write broadcast ack time" in centiseconds (100 per second)
11.2: "redo write broadcast ack time" in microseconds (1000 per millisecond)

VERSION              SNAP_ID INST STAT_NAME                                      VALUE        MILLISECONDS
----------------- ---------- ---- ------------------------------ --------------------- -------------------
11.2.0.3.0             12002    1 redo write broadcast ack time                 617076             617.076
11.2.0.3.0             12002    1 redo write broadcast ack time                 617076             617.076
11.2.0.3.0             12002    1 redo write time                                 3189           31890.000
11.2.0.3.0             12002    1 redo write time                                 3189           31890.000
11.2.0.3.0             12002    1 redo write time                                 3189           31890.000
11.2.0.3.0             12002    1 redo write broadcast ack time                 617076             617.076
11.2.0.3.0             12002    1 redo write broadcast ack count                  4820
11.2.0.3.0             12002    1 redo write broadcast ack count                  4820
11.2.0.3.0             12002    1 redo writes                                     8802
11.2.0.3.0             12002    1 redo writes                                     8802
11.2.0.3.0             12002    1 redo writes                                     8802
11.2.0.3.0             12002    1 redo write broadcast ack count                  4820
11.2.0.3.0             12002    2 redo write broadcast lgwr post                    10
11.2.0.3.0             12002    2 redo write broadcast lgwr post                    10
11.2.0.3.0             12002    2 redo write time                               305710         3057100.000
11.2.0.3.0             12002    2 redo write time                               305710         3057100.000
11.2.0.3.0             12002    2 redo write time                               305710         3057100.000
11.2.0.3.0             12002    2 redo write broadcast ack count                758556
11.2.0.3.0             12002    2 redo write broadcast ack count                758556
11.2.0.3.0             12002    2 redo write broadcast ack count                758556
11.2.0.3.0             12002    2 redo writes                                  1415207
11.2.0.3.0             12002    2 redo writes                                  1415207
11.2.0.3.0             12002    2 redo writes                                  1415207
11.2.0.3.0             12002    2 redo write broadcast ack time              716928320          716928.320
11.2.0.3.0             12002    2 redo write broadcast ack time              716928320          716928.320
11.2.0.3.0             12002    2 redo write broadcast ack time              716928320          716928.320
11.2.0.3.0             12002    2 redo write broadcast lgwr post                    10
11.2.0.3.0             12002    3 redo write broadcast ack time                 516862             516.862
11.2.0.3.0             12002    3 redo write broadcast ack time                 516862             516.862
11.2.0.3.0             12002    3 redo write time                                 1391           13910.000
11.2.0.3.0             12002    3 redo write time                                 1391           13910.000
11.2.0.3.0             12002    3 redo write time                                 1391           13910.000
11.2.0.3.0             12002    3 redo write broadcast ack time                 516862             516.862
11.2.0.3.0             12002    3 redo write broadcast ack count                  5503
11.2.0.3.0             12002    3 redo write broadcast ack count                  5503
11.2.0.3.0             12002    3 redo writes                                     7723
11.2.0.3.0             12002    3 redo writes                                     7723
11.2.0.3.0             12002    3 redo writes                                     7723
11.2.0.3.0             12002    3 redo write broadcast ack count                  5503
11.2.0.3.0             12002    4 redo write broadcast lgwr post                    91
11.2.0.3.0             12002    4 redo write broadcast lgwr post                    91
11.2.0.3.0             12002    4 redo write time                              1903590        19035900.000
11.2.0.3.0             12002    4 redo write time                              1903590        19035900.000
11.2.0.3.0             12002    4 redo write time                              1903590        19035900.000
11.2.0.3.0             12002    4 redo write broadcast ack count               4069195
11.2.0.3.0             12002    4 redo write broadcast ack count               4069195
11.2.0.3.0             12002    4 redo write broadcast ack count               4069195
11.2.0.3.0             12002    4 redo writes                                  6554487
11.2.0.3.0             12002    4 redo writes                                  6554487
11.2.0.3.0             12002    4 redo writes                                  6554487
11.2.0.3.0             12002    4 redo write broadcast ack time             2473935096         2473935.096
11.2.0.3.0             12002    4 redo write broadcast lgwr post                    91
11.2.0.3.0             12002    4 redo write broadcast ack time             2473935096         2473935.096
11.2.0.3.0             12002    4 redo write broadcast ack time             2473935096         2473935.096
11.2.0.3.0             12003    1 redo write broadcast ack time                 752987             752.987
11.2.0.3.0             12003    1 redo write broadcast ack time                 752987             752.987
11.2.0.3.0             12003    1 redo write broadcast ack time                 752987             752.987
11.2.0.3.0             12003    1 redo writes                                    12676
11.2.0.3.0             12003    1 redo writes                                    12676
11.2.0.3.0             12003    1 redo write time                                 4022           40220.000
11.2.0.3.0             12003    1 redo write broadcast ack count                  6248
11.2.0.3.0             12003    1 redo write broadcast ack count                  6248
11.2.0.3.0             12003    1 redo write broadcast ack count                  6248
11.2.0.3.0             12003    1 redo write time                                 4022           40220.000
11.2.0.3.0             12003    1 redo write time                                 4022           40220.000
11.2.0.3.0             12003    1 redo writes                                    12676
11.2.0.3.0             12003    2 redo write broadcast ack time              717871855          717871.855
11.2.0.3.0             12003    2 redo write broadcast ack time              717871855          717871.855
11.2.0.3.0             12003    2 redo write broadcast ack time              717871855          717871.855
11.2.0.3.0             12003    2 redo writes                                  1427035
11.2.0.3.0             12003    2 redo writes                                  1427035
11.2.0.3.0             12003    2 redo writes                                  1427035
11.2.0.3.0             12003    2 redo write broadcast ack count                768504
11.2.0.3.0             12003    2 redo write broadcast ack count                768504
11.2.0.3.0             12003    2 redo write broadcast ack count                768504
11.2.0.3.0             12003    2 redo write time                               306911         3069110.000
11.2.0.3.0             12003    2 redo write time                               306911         3069110.000
11.2.0.3.0             12003    2 redo write time                               306911         3069110.000
11.2.0.3.0             12003    2 redo write broadcast lgwr post                    10
11.2.0.3.0             12003    2 redo write broadcast lgwr post                    10
11.2.0.3.0             12003    2 redo write broadcast lgwr post                    10
11.2.0.3.0             12003    3 redo write broadcast ack time                 736708             736.708
11.2.0.3.0             12003    3 redo write broadcast ack time                 736708             736.708
11.2.0.3.0             12003    3 redo write time                                 1959           19590.000
11.2.0.3.0             12003    3 redo write time                                 1959           19590.000
11.2.0.3.0             12003    3 redo write time                                 1959           19590.000
11.2.0.3.0             12003    3 redo write broadcast ack time                 736708             736.708
11.2.0.3.0             12003    3 redo write broadcast ack count                  7894
11.2.0.3.0             12003    3 redo write broadcast ack count                  7894
11.2.0.3.0             12003    3 redo writes                                    12275
11.2.0.3.0             12003    3 redo writes                                    12275
11.2.0.3.0             12003    3 redo writes                                    12275
11.2.0.3.0             12003    3 redo write broadcast ack count                  7894
11.2.0.3.0             12003    4 redo write broadcast lgwr post                    91
11.2.0.3.0             12003    4 redo write broadcast lgwr post                    91
11.2.0.3.0             12003    4 redo write time                              1903888        19038880.000
11.2.0.3.0             12003    4 redo write time                              1903888        19038880.000

VERSION              SNAP_ID INST STAT_NAME                                      VALUE        MILLISECONDS
----------------- ---------- ---- ------------------------------ --------------------- -------------------
11.2.0.3.0             12003    4 redo write time                              1903888        19038880.000
11.2.0.3.0             12003    4 redo write broadcast ack count               4070420
11.2.0.3.0             12003    4 redo write broadcast ack count               4070420
11.2.0.3.0             12003    4 redo write broadcast ack count               4070420
11.2.0.3.0             12003    4 redo writes                                  6558259
11.2.0.3.0             12003    4 redo writes                                  6558259
11.2.0.3.0             12003    4 redo writes                                  6558259
11.2.0.3.0             12003    4 redo write broadcast ack time             2474064348         2474064.348
11.2.0.3.0             12003    4 redo write broadcast lgwr post                    91
11.2.0.3.0             12003    4 redo write broadcast ack time             2474064348         2474064.348
11.2.0.3.0             12003    4 redo write broadcast ack time             2474064348         2474064.348
11.2.0.3.0             12004    1 redo write broadcast ack time                 930969             930.969
11.2.0.3.0             12004    1 redo write broadcast ack time                 930969             930.969
11.2.0.3.0             12004    1 redo write time                                 4343           43430.000
11.2.0.3.0             12004    1 redo write time                                 4343           43430.000
11.2.0.3.0             12004    1 redo write time                                 4343           43430.000
11.2.0.3.0             12004    1 redo write broadcast ack time                 930969             930.969
11.2.0.3.0             12004    1 redo write broadcast ack count                  8584
11.2.0.3.0             12004    1 redo write broadcast ack count                  8584
11.2.0.3.0             12004    1 redo writes                                    16534
11.2.0.3.0             12004    1 redo writes                                    16534
11.2.0.3.0             12004    1 redo writes                                    16534
11.2.0.3.0             12004    1 redo write broadcast ack count                  8584
11.2.0.3.0             12004    2 redo write broadcast lgwr post                    10
11.2.0.3.0             12004    2 redo write broadcast lgwr post                    10
11.2.0.3.0             12004    2 redo write time                               307154         3071540.000
11.2.0.3.0             12004    2 redo write time                               307154         3071540.000
11.2.0.3.0             12004    2 redo write time                               307154         3071540.000
11.2.0.3.0             12004    2 redo write broadcast ack count                769353
11.2.0.3.0             12004    2 redo write broadcast ack count                769353
11.2.0.3.0             12004    2 redo write broadcast ack count                769353
11.2.0.3.0             12004    2 redo writes                                  1429909
11.2.0.3.0             12004    2 redo writes                                  1429909
11.2.0.3.0             12004    2 redo writes                                  1429909
11.2.0.3.0             12004    2 redo write broadcast ack time              717950177          717950.177
11.2.0.3.0             12004    2 redo write broadcast ack time              717950177          717950.177
11.2.0.3.0             12004    2 redo write broadcast ack time              717950177          717950.177
11.2.0.3.0             12004    2 redo write broadcast lgwr post                    10
11.2.0.3.0             12004    3 redo write broadcast ack time                 940558             940.558
11.2.0.3.0             12004    3 redo write broadcast ack time                 940558             940.558
11.2.0.3.0             12004    3 redo write time                                 2210           22100.000
11.2.0.3.0             12004    3 redo write time                                 2210           22100.000
11.2.0.3.0             12004    3 redo write time                                 2210           22100.000
11.2.0.3.0             12004    3 redo write broadcast ack time                 940558             940.558
11.2.0.3.0             12004    3 redo write broadcast ack count                  9758
11.2.0.3.0             12004    3 redo write broadcast ack count                  9758
11.2.0.3.0             12004    3 redo writes                                    15030
11.2.0.3.0             12004    3 redo writes                                    15030
11.2.0.3.0             12004    3 redo writes                                    15030
11.2.0.3.0             12004    3 redo write broadcast ack count                  9758
11.2.0.3.0             12004    4 redo write broadcast lgwr post                    91
11.2.0.3.0             12004    4 redo write broadcast lgwr post                    91
11.2.0.3.0             12004    4 redo write time                              1904066        19040660.000
11.2.0.3.0             12004    4 redo write time                              1904066        19040660.000
11.2.0.3.0             12004    4 redo write time                              1904066        19040660.000
11.2.0.3.0             12004    4 redo write broadcast ack count               4071478
11.2.0.3.0             12004    4 redo write broadcast ack count               4071478
11.2.0.3.0             12004    4 redo write broadcast ack count               4071478
11.2.0.3.0             12004    4 redo writes                                  6560726
11.2.0.3.0             12004    4 redo writes                                  6560726
11.2.0.3.0             12004    4 redo writes                                  6560726
11.2.0.3.0             12004    4 redo write broadcast ack time             2474150478         2474150.478
11.2.0.3.0             12004    4 redo write broadcast lgwr post                    91
11.2.0.3.0             12004    4 redo write broadcast ack time             2474150478         2474150.478
11.2.0.3.0             12004    4 redo write broadcast ack time             2474150478         2474150.478

AWR LFS AND OTHER RELATED WAITS FOR WORST LFS AWRs:

APPROACH: These are the AWR snaps where the average 'log file sync'
times were the highest. Look at related waits at those times.

   SNAP_ID INST NAME                                     TOTAL_WAITS   TOTAL_WAIT_TIME   AVG_TIME_WAITED
---------- ---- ---------------------------------------- ----------- ----------------- -----------------
     12002    1 LNS ASYNC end of log                            8052       1087677.181           135.082
     12002    3 LNS ASYNC end of log                            7084        811066.039           114.493
     12002    2 LNS ASYNC end of log                         1404161     122629988.406            87.333
     12002    4 LNS ASYNC end of log                         5914933     444519559.591            75.152
     12002    4 log file switch completion                       311         22264.457            71.590
     12002    4 wait for scn ack                                 264         18254.171            69.145
     12002    1 log file sync                                    672         44087.518            65.606
     12002    2 log file switch completion                        17          1103.977            64.940
     12002    1 LNS wait on ATTACH                                 1            56.814            56.814
     12002    3 LNS wait on ATTACH                                 1            50.170            50.170
     12002    2 LNS wait on ATTACH                                 2            98.335            49.168
     12002    4 LNS wait on ATTACH                                 3           145.093            48.364
     12002    2 wait for scn ack                                  60           747.105            12.452
     12002    3 LGWR-LNS wait on channel                         158          1725.250            10.919
     12002    1 LGWR-LNS wait on channel                         190          2073.134            10.911
     12002    1 LNS wait on SENDREQ                             7976         86820.383            10.885
     12002    4 LGWR-LNS wait on channel                          87           938.285            10.785
     12002    3 LNS wait on SENDREQ                             7086         54784.877             7.731
     12002    2 gc cr grant 2-way                            3794318      21304130.215             5.615
     12002    1 log file parallel write                         8785         30791.547             3.505
     12002    4 log file sync                                1448060       4747362.294             3.278
     12002    4 log file parallel write                      6554474      18152010.406             2.769
     12002    3 log file sync                                   1349          3726.670             2.763
     12002    4 LNS wait on SENDREQ                          6461457      16776303.653             2.596
     12002    4 gc cr grant 2-way                           17568450      43997772.292             2.504
     12002    2 gc current block 2-way                       2874957       7059154.506             2.455
     12002    2 log file sync                                 414752        988001.648             2.382
     12002    2 log file parallel write                      1415193       2854074.766             2.017
     12002    3 log file parallel write                         7704         12760.274             1.656
     12002    4 gc current block 2-way                       7512721      10245932.882             1.364
     12002    4 LNS wait on DETACH                                 3             3.678             1.226
     12002    2 LNS wait on SENDREQ                          1428081       1714474.726             1.201
     12002    1 gcs log flush sync                               190           212.773             1.120
     12002    2 LNS wait on DETACH                                 2             1.885              .943
     12002    2 gcs log flush sync                            236857        208983.145              .882
     12002    3 gcs log flush sync                               158           118.364              .749
     12002    4 gcs log flush sync                           1392997       1037398.423              .745
     12002    1 gc cr grant 2-way                              22893          8139.746              .356
     12002    3 gc current block 2-way                         39764          7058.443              .178
     12002    1 gc current block 2-way                         27091          4675.091              .173
     12002    3 gc cr grant 2-way                             127350         17523.942              .138
     12002    4 LGWR wait for redo copy                       571693         50818.656              .089
     12002    2 LGWR wait for redo copy                       132334          7691.191              .058
     12002    1 LGWR wait for redo copy                          783            26.090              .033
     12002    4 LNS wait on LGWR                                   1              .015              .015
     12002    3 LNS wait on LGWR                                   1              .014              .014
     12002    1 LNS wait on LGWR                                   1              .013              .013
     12002    2 LNS wait on LGWR                                   1              .013              .013
     12002    3 LGWR wait for redo copy                          162             1.793              .011
     12002    1 LNS wait on DETACH                                 1              .005              .005
     12002    3 LNS wait on DETACH                                 1              .004              .004
     12003    1 LNS ASYNC end of log                           12113       1987542.522           164.083
     12003    3 LNS ASYNC end of log                           11928       1710073.261           143.366
     12003    2 LNS ASYNC end of log                         1416150     123527403.685            87.228
     12003    4 LNS ASYNC end of log                         5918937     445419203.730            75.253
     12003    4 log file switch completion                       311         22264.457            71.590
     12003    4 wait for scn ack                                 264         18254.171            69.145
     12003    2 log file switch completion                        17          1103.977            64.940
     12003    1 log file sync                                    710         44140.364            62.170
     12003    1 LNS wait on ATTACH                                 1            56.814            56.814
     12003    3 LNS wait on ATTACH                                 1            50.170            50.170
     12003    2 LNS wait on ATTACH                                 2            98.335            49.168
     12003    4 LNS wait on ATTACH                                 3           145.093            48.364
     12003    2 wait for scn ack                                  60           747.105            12.452
     12003    3 LGWR-LNS wait on channel                         158          1725.250            10.919
     12003    1 LGWR-LNS wait on channel                         190          2073.134            10.911
     12003    4 LGWR-LNS wait on channel                          87           938.285            10.785
     12003    1 LNS wait on SENDREQ                            11854         87706.540             7.399
     12003    2 gc cr grant 2-way                            3871517      21314592.498             5.505
     12003    3 LNS wait on SENDREQ                            11653         55784.586             4.787
     12003    4 log file sync                                1448304       4747647.013             3.278
     12003    1 log file parallel write                        12672         38686.767             3.053
     12003    4 log file parallel write                      6558259      18154573.258             2.768
     12003    4 LNS wait on SENDREQ                          6465237      16777052.742             2.595
     12003    3 log file sync                                   1658          4200.097             2.533
     12003    4 gc cr grant 2-way                           17603838      44001885.424             2.500
     12003    2 gc current block 2-way                       2881801       7063031.202             2.451
     12003    2 log file sync                                 414787        988806.288             2.384
     12003    2 log file parallel write                      1427011       2864826.891             2.008
     12003    3 log file parallel write                        12271         17973.657             1.465
     12003    4 gc current block 2-way                       7527706      10249713.511             1.362
     12003    1 gcs log flush sync                               458           591.778             1.292
     12003    4 LNS wait on DETACH                                 3             3.678             1.226
     12003    2 LNS wait on SENDREQ                          1439871       1717180.742             1.193
     12003    3 gcs log flush sync                               195           190.911              .979
     12003    2 LNS wait on DETACH                                 2             1.885              .943
     12003    2 gcs log flush sync                            237209        209952.810              .885
     12003    4 gcs log flush sync                           1393026       1037414.836              .745
     12003    1 gc cr grant 2-way                              64031         12945.670              .202
     12003    3 gc current block 2-way                         84763         14555.321              .172
     12003    1 gc current block 2-way                        120001         17299.261              .144
     12003    3 gc cr grant 2-way                             138946         19894.479              .143
     12003    4 LGWR wait for redo copy                       571763         50821.121              .089
     12003    2 LGWR wait for redo copy                       133330          7702.231              .058
     12003    3 LGWR wait for redo copy                          390            15.901              .041
     12003    1 LGWR wait for redo copy                          806            26.427              .033
     12003    4 LNS wait on LGWR                                   1              .015              .015

   SNAP_ID INST NAME                                     TOTAL_WAITS   TOTAL_WAIT_TIME   AVG_TIME_WAITED
---------- ---- ---------------------------------------- ----------- ----------------- -----------------
     12003    3 LNS wait on LGWR                                   1              .014              .014
     12003    2 LNS wait on LGWR                                   1              .013              .013
     12003    1 LNS wait on LGWR                                   1              .013              .013
     12003    1 LNS wait on DETACH                                 1              .005              .005
     12003    3 LNS wait on DETACH                                 1              .004              .004
     12004    1 LNS ASYNC end of log                           16049       2876827.288           179.253
     12004    3 LNS ASYNC end of log                           15025       2609012.071           173.645
     12004    2 LNS ASYNC end of log                         1419244     124423700.285            87.669
     12004    4 LNS ASYNC end of log                         5921677     446312574.792            75.369
     12004    4 log file switch completion                       311         22264.457            71.590
     12004    4 wait for scn ack                                 264         18254.171            69.145
     12004    2 log file switch completion                        17          1103.977            64.940
     12004    1 log file sync                                    783         44490.880            56.821
     12004    1 LNS wait on ATTACH                                 1            56.814            56.814
     12004    3 LNS wait on ATTACH                                 1            50.170            50.170
     12004    2 LNS wait on ATTACH                                 2            98.335            49.168
     12004    4 LNS wait on ATTACH                                 3           145.093            48.364
     12004    2 wait for scn ack                                  60           747.105            12.452
     12004    3 LGWR-LNS wait on channel                         158          1725.250            10.919
     12004    1 LGWR-LNS wait on channel                         190          2073.134            10.911
     12004    4 LGWR-LNS wait on channel                          87           938.285            10.785
     12004    1 LNS wait on SENDREQ                            15631         99536.654             6.368
     12004    2 gc cr grant 2-way                            3873770      21315221.724             5.502
     12004    3 LNS wait on SENDREQ                            14416         60761.893             4.215
     12004    4 log file sync                                1448434       4747733.174             3.278
     12004    4 log file parallel write                      6560725      18156093.330             2.767
     12004    4 LNS wait on SENDREQ                          6467682      16786499.560             2.595
     12004    1 log file parallel write                        16534         41465.755             2.508
     12004    4 gc cr grant 2-way                           17676451      44007331.019             2.490
     12004    2 gc current block 2-way                       2890442       7068740.285             2.446
     12004    2 log file sync                                 414883        988883.165             2.384
     12004    3 log file sync                                   2057          4724.043             2.297
     12004    2 log file parallel write                      1429908       2866967.440             2.005
     12004    4 gc current block 2-way                       7567603      10254174.048             1.355
     12004    3 log file parallel write                        15022         20120.020             1.339
     12004    4 LNS wait on DETACH                                 3             3.678             1.226
     12004    2 LNS wait on SENDREQ                          1442779       1723546.747             1.195
     12004    1 gcs log flush sync                               530           620.993             1.172
     12004    2 LNS wait on DETACH                                 2             1.885              .943
     12004    2 gcs log flush sync                            237388        210037.296              .885
     12004    3 gcs log flush sync                               290           255.184              .880
     12004    4 gcs log flush sync                           1393069       1037433.423              .745
     12004    3 gc current block 2-way                         96280         19081.871              .198
     12004    1 gc current block 2-way                        144862         21423.658              .148
     12004    3 gc cr grant 2-way                             211146         25785.465              .122
     12004    1 gc cr grant 2-way                             201622         23679.224              .117
     12004    4 LGWR wait for redo copy                       571861         50824.661              .089
     12004    2 LGWR wait for redo copy                       133458          7708.004              .058
     12004    3 LGWR wait for redo copy                          540            23.203              .043
     12004    1 LGWR wait for redo copy                         1445            49.567              .034
     12004    4 LNS wait on LGWR                                   1              .015              .015
     12004    3 LNS wait on LGWR                                   1              .014              .014
     12004    2 LNS wait on LGWR                                   1              .013              .013
     12004    1 LNS wait on LGWR                                   1              .013              .013
     12004    1 LNS wait on DETACH                                 1              .005              .005
     12004    3 LNS wait on DETACH                                 1              .004              .004

AWR HISTOGRAM DATA FOR LFS AND OTHER RELATED WAITS FOR WORST LFS AWRs:
Note: This query won't work on 10.2 - ORA-942

APPROACH: Look at the wait distribution for log file sync waits
by looking at "wait_time_milli". Look at the high wait times then
see if you can correlate those with other related wait events.

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12002    2 wait for scn ack                                       1         15
     12002    2 wait for scn ack                                       2         10
     12002    2 wait for scn ack                                       4         10
     12002    2 wait for scn ack                                       8          4
     12002    2 wait for scn ack                                      16          5
     12002    2 wait for scn ack                                      32         10
     12002    2 wait for scn ack                                      64          4
     12002    2 wait for scn ack                                     128          2
     12002    4 wait for scn ack                                       1          8
     12002    4 wait for scn ack                                       2         22
     12002    4 wait for scn ack                                       4        107
     12002    4 wait for scn ack                                       8         46
     12002    4 wait for scn ack                                      16          9
     12002    4 wait for scn ack                                      32         14
     12002    4 wait for scn ack                                      64         37
     12002    4 wait for scn ack                                     128          1
     12002    4 wait for scn ack                                     256          4
     12002    4 wait for scn ack                                     512          6
     12002    4 wait for scn ack                                    1024          5
     12002    4 wait for scn ack                                    2048          5
     12002    1 log file sync                                          1        625
     12002    1 log file sync                                          2         23
     12002    1 log file sync                                          4          3
     12002    1 log file sync                                          8          3
     12002    1 log file sync                                         16          2
     12002    1 log file sync                                         32          1
     12002    1 log file sync                                         64          9
     12002    1 log file sync                                        128          1
     12002    1 log file sync                                       4096          1
     12002    1 log file sync                                       8192          1
     12002    1 log file sync                                      16384          3
     12002    2 log file sync                                          1     356126
     12002    2 log file sync                                          2      24492
     12002    2 log file sync                                          4      13935
     12002    2 log file sync                                          8       6279
     12002    2 log file sync                                         16       4442
     12002    2 log file sync                                         32       3768
     12002    2 log file sync                                         64       3710
     12002    2 log file sync                                        128       1146
     12002    2 log file sync                                        256        397
     12002    2 log file sync                                        512        341
     12002    2 log file sync                                       1024         65
     12002    2 log file sync                                       2048         20
     12002    2 log file sync                                       4096          5
     12002    2 log file sync                                       8192          3
     12002    2 log file sync                                      16384          1
     12002    3 log file sync                                          1        335
     12002    3 log file sync                                          2        399
     12002    3 log file sync                                          4        545
     12002    3 log file sync                                          8         20
     12002    3 log file sync                                         16         11
     12002    3 log file sync                                         32         18
     12002    3 log file sync                                         64         21
     12002    4 log file sync                                          1    1170647
     12002    4 log file sync                                          2     122295
     12002    4 log file sync                                          4      60014
     12002    4 log file sync                                          8      27500
     12002    4 log file sync                                         16      20298
     12002    4 log file sync                                         32      18526
     12002    4 log file sync                                         64      17243
     12002    4 log file sync                                        128       7034
     12002    4 log file sync                                        256       2718
     12002    4 log file sync                                        512       1000
     12002    4 log file sync                                       1024        432
     12002    4 log file sync                                       2048        154
     12002    4 log file sync                                       4096         56
     12002    4 log file sync                                       8192          8
     12002    4 log file sync                                      32768          1
     12002    2 log file switch completion                            16          1
     12002    2 log file switch completion                            64          9
     12002    2 log file switch completion                           128          6
     12002    2 log file switch completion                           256          1
     12002    4 log file switch completion                             1          3
     12002    4 log file switch completion                             2          4
     12002    4 log file switch completion                             4          1
     12002    4 log file switch completion                             8          3
     12002    4 log file switch completion                            16          9
     12002    4 log file switch completion                            32         48
     12002    4 log file switch completion                            64        114
     12002    4 log file switch completion                           128        101
     12002    4 log file switch completion                           256         25
     12002    4 log file switch completion                           512          1
     12002    4 log file switch completion                          1024          1
     12002    4 log file switch completion                          2048          1
     12002    1 log file parallel write                                1       8334
     12002    1 log file parallel write                                2        213
     12002    1 log file parallel write                                4        104
     12002    1 log file parallel write                                8         37
     12002    1 log file parallel write                               16         41
     12002    1 log file parallel write                               32         58
     12002    1 log file parallel write                               64         42
     12002    1 log file parallel write                              128         13
     12002    1 log file parallel write                              256          5
     12002    1 log file parallel write                              512          2
     12002    1 log file parallel write                             1024          1
     12002    1 log file parallel write                             2048          1
     12002    1 log file parallel write                             8192          1

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12002    1 log file parallel write                            16384          1
     12002    2 log file parallel write                                1    1261493
     12002    2 log file parallel write                                2      44862
     12002    2 log file parallel write                                4      49280
     12002    2 log file parallel write                                8       9533
     12002    2 log file parallel write                               16      11339
     12002    2 log file parallel write                               32      16788
     12002    2 log file parallel write                               64      16147
     12002    2 log file parallel write                              128       4886
     12002    2 log file parallel write                              256       1267
     12002    2 log file parallel write                              512        428
     12002    2 log file parallel write                             1024        111
     12002    2 log file parallel write                             2048         70
     12002    2 log file parallel write                             4096          9
     12002    2 log file parallel write                             8192          1
     12002    2 log file parallel write                            16384          1
     12002    3 log file parallel write                                1       6310
     12002    3 log file parallel write                                2       1078
     12002    3 log file parallel write                                4        137
     12002    3 log file parallel write                                8         25
     12002    3 log file parallel write                               16         52
     12002    3 log file parallel write                               32         75
     12002    3 log file parallel write                               64         60
     12002    3 log file parallel write                              128         11
     12002    3 log file parallel write                              256          8
     12002    3 log file parallel write                              512          1
     12002    3 log file parallel write                             1024          1
     12002    4 log file parallel write                                1    5308910
     12002    4 log file parallel write                                2     320657
     12002    4 log file parallel write                                4     545733
     12002    4 log file parallel write                                8      65481
     12002    4 log file parallel write                               16      64925
     12002    4 log file parallel write                               32     101034
     12002    4 log file parallel write                               64     103602
     12002    4 log file parallel write                              128      31966
     12002    4 log file parallel write                              256       8268
     12002    4 log file parallel write                              512       2633
     12002    4 log file parallel write                             1024        854
     12002    4 log file parallel write                             2048        355
     12002    4 log file parallel write                             4096         78
     12002    4 log file parallel write                             8192          2
     12002    4 log file parallel write                            16384          1
     12002    1 gcs log flush sync                                     1        157
     12002    1 gcs log flush sync                                     2         27
     12002    1 gcs log flush sync                                     4         21
     12002    1 gcs log flush sync                                     8          7
     12002    1 gcs log flush sync                                    16          5
     12002    2 gcs log flush sync                                     1     203847
     12002    2 gcs log flush sync                                     2      11729
     12002    2 gcs log flush sync                                     4       7086
     12002    2 gcs log flush sync                                     8       5048
     12002    2 gcs log flush sync                                    16       9133
     12002    2 gcs log flush sync                                    32         37
     12002    2 gcs log flush sync                                    64         21
     12002    2 gcs log flush sync                                   128          2
     12002    3 gcs log flush sync                                     1        154
     12002    3 gcs log flush sync                                     2          6
     12002    3 gcs log flush sync                                     4          3
     12002    3 gcs log flush sync                                     8          5
     12002    3 gcs log flush sync                                    16          3
     12002    4 gcs log flush sync                                     1    1235793
     12002    4 gcs log flush sync                                     2      56029
     12002    4 gcs log flush sync                                     4      34429
     12002    4 gcs log flush sync                                     8      24781
     12002    4 gcs log flush sync                                    16      41969
     12002    4 gcs log flush sync                                    32          1
     12002    1 gc current block 2-way                                 1      26894
     12002    1 gc current block 2-way                                 2        117
     12002    1 gc current block 2-way                                 4         70
     12002    1 gc current block 2-way                                 8         45
     12002    1 gc current block 2-way                                16         19
     12002    1 gc current block 2-way                                32         22
     12002    1 gc current block 2-way                                64          8
     12002    1 gc current block 2-way                               128          2
     12002    2 gc current block 2-way                                 1    2824486
     12002    2 gc current block 2-way                                 2      15295
     12002    2 gc current block 2-way                                 4      13799
     12002    2 gc current block 2-way                                 8      11406
     12002    2 gc current block 2-way                                16       5506
     12002    2 gc current block 2-way                                32       1999
     12002    2 gc current block 2-way                                64       1356
     12002    2 gc current block 2-way                               128        871
     12002    2 gc current block 2-way                               256        232
     12002    2 gc current block 2-way                               512         36
     12002    2 gc current block 2-way                              1024         21
     12002    2 gc current block 2-way                              2048          6
     12002    2 gc current block 2-way                              4096          4
     12002    2 gc current block 2-way                              8192          1
     12002    2 gc current block 2-way                             32768          3
     12002    2 gc current block 2-way                             65536         13
     12002    2 gc current block 2-way                            131072         26
     12002    2 gc current block 2-way                            262144         18
     12002    3 gc current block 2-way                                 1      39556
     12002    3 gc current block 2-way                                 2        115
     12002    3 gc current block 2-way                                 4         70
     12002    3 gc current block 2-way                                 8         45
     12002    3 gc current block 2-way                                16         60

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12002    3 gc current block 2-way                                32         53
     12002    3 gc current block 2-way                                64          8
     12002    4 gc current block 2-way                                 1    7449033
     12002    4 gc current block 2-way                                 2      26745
     12002    4 gc current block 2-way                                 4      12496
     12002    4 gc current block 2-way                                 8       7529
     12002    4 gc current block 2-way                                16       5717
     12002    4 gc current block 2-way                                32       4144
     12002    4 gc current block 2-way                                64       3015
     12002    4 gc current block 2-way                               128       1737
     12002    4 gc current block 2-way                               256        646
     12002    4 gc current block 2-way                               512        211
     12002    4 gc current block 2-way                              1024         69
     12002    4 gc current block 2-way                              2048         20
     12002    4 gc current block 2-way                              4096         15
     12002    4 gc current block 2-way                              8192          8
     12002    4 gc current block 2-way                             16384         12
     12002    4 gc current block 2-way                             32768         13
     12002    4 gc current block 2-way                             65536         16
     12002    4 gc current block 2-way                            131072         33
     12002    4 gc current block 2-way                            262144         24
     12002    1 gc cr grant 2-way                                      1      22134
     12002    1 gc cr grant 2-way                                      2        247
     12002    1 gc cr grant 2-way                                      4        174
     12002    1 gc cr grant 2-way                                      8        129
     12002    1 gc cr grant 2-way                                     16        102
     12002    1 gc cr grant 2-way                                     32         75
     12002    1 gc cr grant 2-way                                     64         23
     12002    1 gc cr grant 2-way                                    128          8
     12002    2 gc cr grant 2-way                                      1    3742006
     12002    2 gc cr grant 2-way                                      2      21186
     12002    2 gc cr grant 2-way                                      4      11313
     12002    2 gc cr grant 2-way                                      8       7412
     12002    2 gc cr grant 2-way                                     16       5835
     12002    2 gc cr grant 2-way                                     32       3859
     12002    2 gc cr grant 2-way                                     64       2888
     12002    2 gc cr grant 2-way                                    128       1777
     12002    2 gc cr grant 2-way                                    256        201
     12002    2 gc cr grant 2-way                                    512         21
     12002    2 gc cr grant 2-way                                   1024          4
     12002    2 gc cr grant 2-way                                   2048          7
     12002    2 gc cr grant 2-way                                   4096          6
     12002    2 gc cr grant 2-way                                   8192          1
     12002    2 gc cr grant 2-way                                  16384          9
     12002    2 gc cr grant 2-way                                  32768          7
     12002    2 gc cr grant 2-way                                  65536         29
     12002    2 gc cr grant 2-way                                 131072         95
     12002    2 gc cr grant 2-way                                 262144         52
     12002    3 gc cr grant 2-way                                      1     126278
     12002    3 gc cr grant 2-way                                      2        343
     12002    3 gc cr grant 2-way                                      4        284
     12002    3 gc cr grant 2-way                                      8        180
     12002    3 gc cr grant 2-way                                     16        140
     12002    3 gc cr grant 2-way                                     32         86
     12002    3 gc cr grant 2-way                                     64         38
     12002    3 gc cr grant 2-way                                    128          2
     12002    4 gc cr grant 2-way                                      1   17336663
     12002    4 gc cr grant 2-way                                      2      85427
     12002    4 gc cr grant 2-way                                      4      46059
     12002    4 gc cr grant 2-way                                      8      29375
     12002    4 gc cr grant 2-way                                     16      24435
     12002    4 gc cr grant 2-way                                     32      19692
     12002    4 gc cr grant 2-way                                     64      15051
     12002    4 gc cr grant 2-way                                    128       7406
     12002    4 gc cr grant 2-way                                    256       1257
     12002    4 gc cr grant 2-way                                    512        371
     12002    4 gc cr grant 2-way                                   1024         95
     12002    4 gc cr grant 2-way                                   2048         40
     12002    4 gc cr grant 2-way                                   4096         11
     12002    4 gc cr grant 2-way                                   8192         36
     12002    4 gc cr grant 2-way                                  16384         53
     12002    4 gc cr grant 2-way                                  32768         53
     12002    4 gc cr grant 2-way                                  65536         76
     12002    4 gc cr grant 2-way                                 131072         99
     12002    4 gc cr grant 2-way                                 262144        111
     12002    4 gc cr grant 2-way                                 524288          9
     12002    1 LNS wait on SENDREQ                                    1       7390
     12002    1 LNS wait on SENDREQ                                    2        104
     12002    1 LNS wait on SENDREQ                                    4        218
     12002    1 LNS wait on SENDREQ                                    8        186
     12002    1 LNS wait on SENDREQ                                   16        130
     12002    1 LNS wait on SENDREQ                                   32          7
     12002    1 LNS wait on SENDREQ                                 2048          1
     12002    1 LNS wait on SENDREQ                                 4096          2
     12002    1 LNS wait on SENDREQ                                 8192          1
     12002    1 LNS wait on SENDREQ                                16384          4
     12002    1 LNS wait on SENDREQ                                32768          1
     12002    2 LNS wait on SENDREQ                                    1    1296677
     12002    2 LNS wait on SENDREQ                                    2      28009
     12002    2 LNS wait on SENDREQ                                    4      14588
     12002    2 LNS wait on SENDREQ                                    8      16679
     12002    2 LNS wait on SENDREQ                                   16      41921
     12002    2 LNS wait on SENDREQ                                   32      30267
     12002    2 LNS wait on SENDREQ                                   64        813
     12002    2 LNS wait on SENDREQ                                  128         42
     12002    2 LNS wait on SENDREQ                                  256         52
     12002    2 LNS wait on SENDREQ                                  512         27

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12002    2 LNS wait on SENDREQ                                 1024          8
     12002    2 LNS wait on SENDREQ                                 2048          6
     12002    2 LNS wait on SENDREQ                                 4096          3
     12002    2 LNS wait on SENDREQ                                 8192          2
     12002    2 LNS wait on SENDREQ                                16384          5
     12002    2 LNS wait on SENDREQ                                32768          3
     12002    3 LNS wait on SENDREQ                                    1       5688
     12002    3 LNS wait on SENDREQ                                    2        117
     12002    3 LNS wait on SENDREQ                                    4        109
     12002    3 LNS wait on SENDREQ                                    8        131
     12002    3 LNS wait on SENDREQ                                   16       1081
     12002    3 LNS wait on SENDREQ                                   32         11
     12002    3 LNS wait on SENDREQ                                 4096          1
     12002    3 LNS wait on SENDREQ                                16384          1
     12002    3 LNS wait on SENDREQ                                32768          1
     12002    4 LNS wait on SENDREQ                                    1    5483491
     12002    4 LNS wait on SENDREQ                                    2     106067
     12002    4 LNS wait on SENDREQ                                    4      70403
     12002    4 LNS wait on SENDREQ                                    8      73682
     12002    4 LNS wait on SENDREQ                                   16     285893
     12002    4 LNS wait on SENDREQ                                   32     416297
     12002    4 LNS wait on SENDREQ                                   64      22790
     12002    4 LNS wait on SENDREQ                                  128        397
     12002    4 LNS wait on SENDREQ                                  256       1123
     12002    4 LNS wait on SENDREQ                                  512        817
     12002    4 LNS wait on SENDREQ                                 1024        219
     12002    4 LNS wait on SENDREQ                                 2048        113
     12002    4 LNS wait on SENDREQ                                 4096         67
     12002    4 LNS wait on SENDREQ                                 8192         63
     12002    4 LNS wait on SENDREQ                                16384         35
     12002    4 LNS wait on SENDREQ                                32768         17
     12002    4 LNS wait on SENDREQ                                65536          8
     12002    1 LNS wait on LGWR                                       1          1
     12002    2 LNS wait on LGWR                                       1          1
     12002    3 LNS wait on LGWR                                       1          1
     12002    4 LNS wait on LGWR                                       1          1
     12002    1 LNS wait on DETACH                                     1          1
     12002    2 LNS wait on DETACH                                     1          1
     12002    2 LNS wait on DETACH                                     2          1
     12002    3 LNS wait on DETACH                                     1          1
     12002    4 LNS wait on DETACH                                     1          1
     12002    4 LNS wait on DETACH                                     2          2
     12002    1 LNS wait on ATTACH                                    64          1
     12002    2 LNS wait on ATTACH                                    64          2
     12002    3 LNS wait on ATTACH                                    64          1
     12002    4 LNS wait on ATTACH                                    64          3
     12002    1 LNS ASYNC end of log                                   1       1735
     12002    1 LNS ASYNC end of log                                   2        263
     12002    1 LNS ASYNC end of log                                   4        362
     12002    1 LNS ASYNC end of log                                   8        332
     12002    1 LNS ASYNC end of log                                  16        283
     12002    1 LNS ASYNC end of log                                  32        573
     12002    1 LNS ASYNC end of log                                  64        464
     12002    1 LNS ASYNC end of log                                 128       1612
     12002    1 LNS ASYNC end of log                                 256       1411
     12002    1 LNS ASYNC end of log                                 512        590
     12002    1 LNS ASYNC end of log                                1024        495
     12002    2 LNS ASYNC end of log                                   1     203994
     12002    2 LNS ASYNC end of log                                   2      66463
     12002    2 LNS ASYNC end of log                                   4     138525
     12002    2 LNS ASYNC end of log                                   8     116539
     12002    2 LNS ASYNC end of log                                  16      73469
     12002    2 LNS ASYNC end of log                                  32     191678
     12002    2 LNS ASYNC end of log                                  64     117758
     12002    2 LNS ASYNC end of log                                 128     276371
     12002    2 LNS ASYNC end of log                                 256     109123
     12002    2 LNS ASYNC end of log                                 512      62935
     12002    2 LNS ASYNC end of log                                1024      48327
     12002    2 LNS ASYNC end of log                                2048          1
     12002    3 LNS ASYNC end of log                                   1       1196
     12002    3 LNS ASYNC end of log                                   2        132
     12002    3 LNS ASYNC end of log                                   4        237
     12002    3 LNS ASYNC end of log                                   8        562
     12002    3 LNS ASYNC end of log                                  16        199
     12002    3 LNS ASYNC end of log                                  32        344
     12002    3 LNS ASYNC end of log                                  64        649
     12002    3 LNS ASYNC end of log                                 128       2070
     12002    3 LNS ASYNC end of log                                 256       1022
     12002    3 LNS ASYNC end of log                                 512        454
     12002    3 LNS ASYNC end of log                                1024        273
     12002    4 LNS ASYNC end of log                                   1     891665
     12002    4 LNS ASYNC end of log                                   2     640258
     12002    4 LNS ASYNC end of log                                   4     487397
     12002    4 LNS ASYNC end of log                                   8     487178
     12002    4 LNS ASYNC end of log                                  16     353539
     12002    4 LNS ASYNC end of log                                  32     661911
     12002    4 LNS ASYNC end of log                                  64     521300
     12002    4 LNS ASYNC end of log                                 128    1016317
     12002    4 LNS ASYNC end of log                                 256     476596
     12002    4 LNS ASYNC end of log                                 512     220230
     12002    4 LNS ASYNC end of log                                1024     158545
     12002    4 LNS ASYNC end of log                                2048         22
     12002    1 LGWR-LNS wait on channel                               1          1
     12002    1 LGWR-LNS wait on channel                               8          1
     12002    1 LGWR-LNS wait on channel                              16        188
     12002    3 LGWR-LNS wait on channel                               1          1
     12002    3 LGWR-LNS wait on channel                               8          1

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12002    3 LGWR-LNS wait on channel                              16        156
     12002    4 LGWR-LNS wait on channel                               1          1
     12002    4 LGWR-LNS wait on channel                               4          1
     12002    4 LGWR-LNS wait on channel                              16         85
     12002    1 LGWR wait for redo copy                                1        784
     12002    2 LGWR wait for redo copy                                1     130659
     12002    2 LGWR wait for redo copy                                2       1342
     12002    2 LGWR wait for redo copy                                4        354
     12002    2 LGWR wait for redo copy                                8         27
     12002    2 LGWR wait for redo copy                               16          7
     12002    2 LGWR wait for redo copy                               32          8
     12002    2 LGWR wait for redo copy                               64          2
     12002    2 LGWR wait for redo copy                              128          1
     12002    3 LGWR wait for redo copy                                1        163
     12002    4 LGWR wait for redo copy                                1     567099
     12002    4 LGWR wait for redo copy                                2       2676
     12002    4 LGWR wait for redo copy                                4        825
     12002    4 LGWR wait for redo copy                                8        424
     12002    4 LGWR wait for redo copy                               16        283
     12002    4 LGWR wait for redo copy                               32        191
     12002    4 LGWR wait for redo copy                               64        129
     12002    4 LGWR wait for redo copy                              128         59
     12002    4 LGWR wait for redo copy                              256          7
     12003    2 wait for scn ack                                       1         15
     12003    2 wait for scn ack                                       2         10
     12003    2 wait for scn ack                                       4         10
     12003    2 wait for scn ack                                       8          4
     12003    2 wait for scn ack                                      16          5
     12003    2 wait for scn ack                                      32         10
     12003    2 wait for scn ack                                      64          4
     12003    2 wait for scn ack                                     128          2
     12003    4 wait for scn ack                                       1          8
     12003    4 wait for scn ack                                       2         22
     12003    4 wait for scn ack                                       4        107
     12003    4 wait for scn ack                                       8         46
     12003    4 wait for scn ack                                      16          9
     12003    4 wait for scn ack                                      32         14
     12003    4 wait for scn ack                                      64         37
     12003    4 wait for scn ack                                     128          1
     12003    4 wait for scn ack                                     256          4
     12003    4 wait for scn ack                                     512          6
     12003    4 wait for scn ack                                    1024          5
     12003    4 wait for scn ack                                    2048          5
     12003    1 log file sync                                          1        657
     12003    1 log file sync                                          2         27
     12003    1 log file sync                                          4          3
     12003    1 log file sync                                          8          5
     12003    1 log file sync                                         16          2
     12003    1 log file sync                                         32          2
     12003    1 log file sync                                         64          9
     12003    1 log file sync                                        128          1
     12003    1 log file sync                                       4096          1
     12003    1 log file sync                                       8192          1
     12003    1 log file sync                                      16384          3
     12003    2 log file sync                                          1     356156
     12003    2 log file sync                                          2      24494
     12003    2 log file sync                                          4      13935
     12003    2 log file sync                                          8       6280
     12003    2 log file sync                                         16       4442
     12003    2 log file sync                                         32       3769
     12003    2 log file sync                                         64       3710
     12003    2 log file sync                                        128       1146
     12003    2 log file sync                                        256        397
     12003    2 log file sync                                        512        341
     12003    2 log file sync                                       1024         66
     12003    2 log file sync                                       2048         20
     12003    2 log file sync                                       4096          5
     12003    2 log file sync                                       8192          3
     12003    2 log file sync                                      16384          1
     12003    3 log file sync                                          1        626
     12003    3 log file sync                                          2        406
     12003    3 log file sync                                          4        547
     12003    3 log file sync                                          8         21
     12003    3 log file sync                                         16         13
     12003    3 log file sync                                         32         23
     12003    3 log file sync                                         64         21
     12003    3 log file sync                                        256          1
     12003    4 log file sync                                          1    1170870
     12003    4 log file sync                                          2     122305
     12003    4 log file sync                                          4      60019
     12003    4 log file sync                                          8      27502
     12003    4 log file sync                                         16      20299
     12003    4 log file sync                                         32      18527
     12003    4 log file sync                                         64      17245
     12003    4 log file sync                                        128       7034
     12003    4 log file sync                                        256       2718
     12003    4 log file sync                                        512       1000
     12003    4 log file sync                                       1024        432
     12003    4 log file sync                                       2048        154
     12003    4 log file sync                                       4096         56
     12003    4 log file sync                                       8192          8
     12003    4 log file sync                                      32768          1
     12003    2 log file switch completion                            16          1
     12003    2 log file switch completion                            64          9
     12003    2 log file switch completion                           128          6
     12003    2 log file switch completion                           256          1
     12003    4 log file switch completion                             1          3

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12003    4 log file switch completion                             2          4
     12003    4 log file switch completion                             4          1
     12003    4 log file switch completion                             8          3
     12003    4 log file switch completion                            16          9
     12003    4 log file switch completion                            32         48
     12003    4 log file switch completion                            64        114
     12003    4 log file switch completion                           128        101
     12003    4 log file switch completion                           256         25
     12003    4 log file switch completion                           512          1
     12003    4 log file switch completion                          1024          1
     12003    4 log file switch completion                          2048          1
     12003    1 log file parallel write                                1      11937
     12003    1 log file parallel write                                2        305
     12003    1 log file parallel write                                4        146
     12003    1 log file parallel write                                8         56
     12003    1 log file parallel write                               16         63
     12003    1 log file parallel write                               32         82
     12003    1 log file parallel write                               64         55
     12003    1 log file parallel write                              128         23
     12003    1 log file parallel write                              256          8
     12003    1 log file parallel write                              512          4
     12003    1 log file parallel write                             1024          3
     12003    1 log file parallel write                             2048          2
     12003    1 log file parallel write                             8192          1
     12003    1 log file parallel write                            16384          1
     12003    2 log file parallel write                                1    1271644
     12003    2 log file parallel write                                2      45167
     12003    2 log file parallel write                                4      49485
     12003    2 log file parallel write                                8       9617
     12003    2 log file parallel write                               16      11380
     12003    2 log file parallel write                               32      16824
     12003    2 log file parallel write                               64      16183
     12003    2 log file parallel write                              128       4897
     12003    2 log file parallel write                              256       1270
     12003    2 log file parallel write                              512        430
     12003    2 log file parallel write                             1024        112
     12003    2 log file parallel write                             2048         70
     12003    2 log file parallel write                             4096          9
     12003    2 log file parallel write                             8192          1
     12003    2 log file parallel write                            16384          1
     12003    3 log file parallel write                                1      10619
     12003    3 log file parallel write                                2       1157
     12003    3 log file parallel write                                4        183
     12003    3 log file parallel write                                8         49
     12003    3 log file parallel write                               16         66
     12003    3 log file parallel write                               32         96
     12003    3 log file parallel write                               64         83
     12003    3 log file parallel write                              128         20
     12003    3 log file parallel write                              256         11
     12003    3 log file parallel write                              512          3
     12003    3 log file parallel write                             1024          1
     12003    4 log file parallel write                                1    5312453
     12003    4 log file parallel write                                2     320741
     12003    4 log file parallel write                                4     545806
     12003    4 log file parallel write                                8      65508
     12003    4 log file parallel write                               16      64941
     12003    4 log file parallel write                               32     101043
     12003    4 log file parallel write                               64     103614
     12003    4 log file parallel write                              128      31967
     12003    4 log file parallel write                              256       8269
     12003    4 log file parallel write                              512       2633
     12003    4 log file parallel write                             1024        854
     12003    4 log file parallel write                             2048        355
     12003    4 log file parallel write                             4096         78
     12003    4 log file parallel write                             8192          2
     12003    4 log file parallel write                            16384          1
     12003    1 gcs log flush sync                                     1        354
     12003    1 gcs log flush sync                                     2         38
     12003    1 gcs log flush sync                                     4         29
     12003    1 gcs log flush sync                                     8         20
     12003    1 gcs log flush sync                                    16         23
     12003    2 gcs log flush sync                                     1     204113
     12003    2 gcs log flush sync                                     2      11738
     12003    2 gcs log flush sync                                     4       7097
     12003    2 gcs log flush sync                                     8       5066
     12003    2 gcs log flush sync                                    16       9201
     12003    2 gcs log flush sync                                    32         37
     12003    2 gcs log flush sync                                    64         21
     12003    2 gcs log flush sync                                   128          2
     12003    3 gcs log flush sync                                     1        180
     12003    3 gcs log flush sync                                     2          8
     12003    3 gcs log flush sync                                     4          3
     12003    3 gcs log flush sync                                     8          5
     12003    3 gcs log flush sync                                    16          9
     12003    4 gcs log flush sync                                     1    1235826
     12003    4 gcs log flush sync                                     2      56029
     12003    4 gcs log flush sync                                     4      34431
     12003    4 gcs log flush sync                                     8      24781
     12003    4 gcs log flush sync                                    16      41969
     12003    4 gcs log flush sync                                    32          1
     12003    1 gc current block 2-way                                 1     119619
     12003    1 gc current block 2-way                                 2        135
     12003    1 gc current block 2-way                                 4        106
     12003    1 gc current block 2-way                                 8         74
     12003    1 gc current block 2-way                                16         44
     12003    1 gc current block 2-way                                32         38
     12003    1 gc current block 2-way                                64         21

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12003    1 gc current block 2-way                               128          2
     12003    1 gc current block 2-way                               256          1
     12003    2 gc current block 2-way                                 1    2830869
     12003    2 gc current block 2-way                                 2      15364
     12003    2 gc current block 2-way                                 4      13842
     12003    2 gc current block 2-way                                 8      11447
     12003    2 gc current block 2-way                                16       5542
     12003    2 gc current block 2-way                                32       2026
     12003    2 gc current block 2-way                                64       1374
     12003    2 gc current block 2-way                               128        876
     12003    2 gc current block 2-way                               256        234
     12003    2 gc current block 2-way                               512         36
     12003    2 gc current block 2-way                              1024         21
     12003    2 gc current block 2-way                              2048          6
     12003    2 gc current block 2-way                              4096          4
     12003    2 gc current block 2-way                              8192          1
     12003    2 gc current block 2-way                             32768          3
     12003    2 gc current block 2-way                             65536         13
     12003    2 gc current block 2-way                            131072         26
     12003    2 gc current block 2-way                            262144         18
     12003    3 gc current block 2-way                                 1      84245
     12003    3 gc current block 2-way                                 2        169
     12003    3 gc current block 2-way                                 4        114
     12003    3 gc current block 2-way                                 8         79
     12003    3 gc current block 2-way                                16         92
     12003    3 gc current block 2-way                                32         77
     12003    3 gc current block 2-way                                64         16
     12003    3 gc current block 2-way                               128          5
     12003    4 gc current block 2-way                                 1    7463763
     12003    4 gc current block 2-way                                 2      26832
     12003    4 gc current block 2-way                                 4      12560
     12003    4 gc current block 2-way                                 8       7559
     12003    4 gc current block 2-way                                16       5743
     12003    4 gc current block 2-way                                32       4158
     12003    4 gc current block 2-way                                64       3027
     12003    4 gc current block 2-way                               128       1742
     12003    4 gc current block 2-way                               256        646
     12003    4 gc current block 2-way                               512        211
     12003    4 gc current block 2-way                              1024         69
     12003    4 gc current block 2-way                              2048         20
     12003    4 gc current block 2-way                              4096         15
     12003    4 gc current block 2-way                              8192          8
     12003    4 gc current block 2-way                             16384         12
     12003    4 gc current block 2-way                             32768         13
     12003    4 gc current block 2-way                             65536         16
     12003    4 gc current block 2-way                            131072         33
     12003    4 gc current block 2-way                            262144         24
     12003    1 gc cr grant 2-way                                      1      63124
     12003    1 gc cr grant 2-way                                      2        302
     12003    1 gc cr grant 2-way                                      4        204
     12003    1 gc cr grant 2-way                                      8        151
     12003    1 gc cr grant 2-way                                     16        119
     12003    1 gc cr grant 2-way                                     32         92
     12003    1 gc cr grant 2-way                                     64         29
     12003    1 gc cr grant 2-way                                    128         12
     12003    1 gc cr grant 2-way                                    256          1
     12003    2 gc cr grant 2-way                                      1    3815007
     12003    2 gc cr grant 2-way                                      2      21351
     12003    2 gc cr grant 2-way                                      4      11424
     12003    2 gc cr grant 2-way                                      8       7501
     12003    2 gc cr grant 2-way                                     16       5884
     12003    2 gc cr grant 2-way                                     32       3907
     12003    2 gc cr grant 2-way                                     64       2911
     12003    2 gc cr grant 2-way                                    128       1784
     12003    2 gc cr grant 2-way                                    256        202
     12003    2 gc cr grant 2-way                                    512         21
     12003    2 gc cr grant 2-way                                   1024          4
     12003    2 gc cr grant 2-way                                   2048          7
     12003    2 gc cr grant 2-way                                   4096          6
     12003    2 gc cr grant 2-way                                   8192          1
     12003    2 gc cr grant 2-way                                  16384          9
     12003    2 gc cr grant 2-way                                  32768          7
     12003    2 gc cr grant 2-way                                  65536         29
     12003    2 gc cr grant 2-way                                 131072         95
     12003    2 gc cr grant 2-way                                 262144         52
     12003    3 gc cr grant 2-way                                      1     137695
     12003    3 gc cr grant 2-way                                      2        401
     12003    3 gc cr grant 2-way                                      4        331
     12003    3 gc cr grant 2-way                                      8        205
     12003    3 gc cr grant 2-way                                     16        165
     12003    3 gc cr grant 2-way                                     32        103
     12003    3 gc cr grant 2-way                                     64         43
     12003    3 gc cr grant 2-way                                    128          4
     12003    4 gc cr grant 2-way                                      1   17371923
     12003    4 gc cr grant 2-way                                      2      85470
     12003    4 gc cr grant 2-way                                      4      46090
     12003    4 gc cr grant 2-way                                      8      29394
     12003    4 gc cr grant 2-way                                     16      24447
     12003    4 gc cr grant 2-way                                     32      19702
     12003    4 gc cr grant 2-way                                     64      15064
     12003    4 gc cr grant 2-way                                    128       7409
     12003    4 gc cr grant 2-way                                    256       1257
     12003    4 gc cr grant 2-way                                    512        371
     12003    4 gc cr grant 2-way                                   1024         95
     12003    4 gc cr grant 2-way                                   2048         40
     12003    4 gc cr grant 2-way                                   4096         11
     12003    4 gc cr grant 2-way                                   8192         36

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12003    4 gc cr grant 2-way                                  16384         53
     12003    4 gc cr grant 2-way                                  32768         53
     12003    4 gc cr grant 2-way                                  65536         76
     12003    4 gc cr grant 2-way                                 131072         99
     12003    4 gc cr grant 2-way                                 262144        111
     12003    4 gc cr grant 2-way                                 524288          9
     12003    1 LNS wait on SENDREQ                                    1      11127
     12003    1 LNS wait on SENDREQ                                    2        128
     12003    1 LNS wait on SENDREQ                                    4        242
     12003    1 LNS wait on SENDREQ                                    8        208
     12003    1 LNS wait on SENDREQ                                   16        147
     12003    1 LNS wait on SENDREQ                                   32          7
     12003    1 LNS wait on SENDREQ                                 2048          1
     12003    1 LNS wait on SENDREQ                                 4096          2
     12003    1 LNS wait on SENDREQ                                 8192          1
     12003    1 LNS wait on SENDREQ                                16384          4
     12003    1 LNS wait on SENDREQ                                32768          1
     12003    2 LNS wait on SENDREQ                                    1    1307328
     12003    2 LNS wait on SENDREQ                                    2      28068
     12003    2 LNS wait on SENDREQ                                    4      14644
     12003    2 LNS wait on SENDREQ                                    8      16700
     12003    2 LNS wait on SENDREQ                                   16      41945
     12003    2 LNS wait on SENDREQ                                   32      30301
     12003    2 LNS wait on SENDREQ                                   64        813
     12003    2 LNS wait on SENDREQ                                  128         42
     12003    2 LNS wait on SENDREQ                                  256         52
     12003    2 LNS wait on SENDREQ                                  512         27
     12003    2 LNS wait on SENDREQ                                 1024          8
     12003    2 LNS wait on SENDREQ                                 2048          6
     12003    2 LNS wait on SENDREQ                                 4096          3
     12003    2 LNS wait on SENDREQ                                 8192          2
     12003    2 LNS wait on SENDREQ                                16384          5
     12003    2 LNS wait on SENDREQ                                32768          3
     12003    3 LNS wait on SENDREQ                                    1      10119
     12003    3 LNS wait on SENDREQ                                    2        157
     12003    3 LNS wait on SENDREQ                                    4        127
     12003    3 LNS wait on SENDREQ                                    8        151
     12003    3 LNS wait on SENDREQ                                   16       1100
     12003    3 LNS wait on SENDREQ                                   32         13
     12003    3 LNS wait on SENDREQ                                 4096          1
     12003    3 LNS wait on SENDREQ                                16384          1
     12003    3 LNS wait on SENDREQ                                32768          1
     12003    4 LNS wait on SENDREQ                                    1    5487196
     12003    4 LNS wait on SENDREQ                                    2     106085
     12003    4 LNS wait on SENDREQ                                    4      70410
     12003    4 LNS wait on SENDREQ                                    8      73695
     12003    4 LNS wait on SENDREQ                                   16     285910
     12003    4 LNS wait on SENDREQ                                   32     416297
     12003    4 LNS wait on SENDREQ                                   64      22790
     12003    4 LNS wait on SENDREQ                                  128        397
     12003    4 LNS wait on SENDREQ                                  256       1123
     12003    4 LNS wait on SENDREQ                                  512        817
     12003    4 LNS wait on SENDREQ                                 1024        219
     12003    4 LNS wait on SENDREQ                                 2048        113
     12003    4 LNS wait on SENDREQ                                 4096         67
     12003    4 LNS wait on SENDREQ                                 8192         63
     12003    4 LNS wait on SENDREQ                                16384         35
     12003    4 LNS wait on SENDREQ                                32768         17
     12003    4 LNS wait on SENDREQ                                65536          8
     12003    1 LNS wait on LGWR                                       1          1
     12003    2 LNS wait on LGWR                                       1          1
     12003    3 LNS wait on LGWR                                       1          1
     12003    4 LNS wait on LGWR                                       1          1
     12003    1 LNS wait on DETACH                                     1          1
     12003    2 LNS wait on DETACH                                     1          1
     12003    2 LNS wait on DETACH                                     2          1
     12003    3 LNS wait on DETACH                                     1          1
     12003    4 LNS wait on DETACH                                     1          1
     12003    4 LNS wait on DETACH                                     2          2
     12003    1 LNS wait on ATTACH                                    64          1
     12003    2 LNS wait on ATTACH                                    64          2
     12003    3 LNS wait on ATTACH                                    64          1
     12003    4 LNS wait on ATTACH                                    64          3
     12003    1 LNS ASYNC end of log                                   1       2116
     12003    1 LNS ASYNC end of log                                   2        370
     12003    1 LNS ASYNC end of log                                   4        532
     12003    1 LNS ASYNC end of log                                   8        542
     12003    1 LNS ASYNC end of log                                  16        466
     12003    1 LNS ASYNC end of log                                  32        851
     12003    1 LNS ASYNC end of log                                  64        744
     12003    1 LNS ASYNC end of log                                 128       2507
     12003    1 LNS ASYNC end of log                                 256       1896
     12003    1 LNS ASYNC end of log                                 512        929
     12003    1 LNS ASYNC end of log                                1024       1174
     12003    2 LNS ASYNC end of log                                   1     205354
     12003    2 LNS ASYNC end of log                                   2      66865
     12003    2 LNS ASYNC end of log                                   4     140123
     12003    2 LNS ASYNC end of log                                   8     120264
     12003    2 LNS ASYNC end of log                                  16      73985
     12003    2 LNS ASYNC end of log                                  32     192953
     12003    2 LNS ASYNC end of log                                  64     118049
     12003    2 LNS ASYNC end of log                                 128     276842
     12003    2 LNS ASYNC end of log                                 256     109549
     12003    2 LNS ASYNC end of log                                 512      63237
     12003    2 LNS ASYNC end of log                                1024      49004
     12003    2 LNS ASYNC end of log                                2048          1
     12003    3 LNS ASYNC end of log                                   1       2659

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12003    3 LNS ASYNC end of log                                   2        240
     12003    3 LNS ASYNC end of log                                   4        356
     12003    3 LNS ASYNC end of log                                   8        745
     12003    3 LNS ASYNC end of log                                  16        333
     12003    3 LNS ASYNC end of log                                  32        607
     12003    3 LNS ASYNC end of log                                  64        897
     12003    3 LNS ASYNC end of log                                 128       2885
     12003    3 LNS ASYNC end of log                                 256       1532
     12003    3 LNS ASYNC end of log                                 512        741
     12003    3 LNS ASYNC end of log                                1024        950
     12003    4 LNS ASYNC end of log                                   1     892381
     12003    4 LNS ASYNC end of log                                   2     640332
     12003    4 LNS ASYNC end of log                                   4     487476
     12003    4 LNS ASYNC end of log                                   8     487328
     12003    4 LNS ASYNC end of log                                  16     353660
     12003    4 LNS ASYNC end of log                                  32     662123
     12003    4 LNS ASYNC end of log                                  64     521549
     12003    4 LNS ASYNC end of log                                 128    1017134
     12003    4 LNS ASYNC end of log                                 256     477194
     12003    4 LNS ASYNC end of log                                 512     220530
     12003    4 LNS ASYNC end of log                                1024     159213
     12003    4 LNS ASYNC end of log                                2048         22
     12003    1 LGWR-LNS wait on channel                               1          1
     12003    1 LGWR-LNS wait on channel                               8          1
     12003    1 LGWR-LNS wait on channel                              16        188
     12003    3 LGWR-LNS wait on channel                               1          1
     12003    3 LGWR-LNS wait on channel                               8          1
     12003    3 LGWR-LNS wait on channel                              16        156
     12003    4 LGWR-LNS wait on channel                               1          1
     12003    4 LGWR-LNS wait on channel                               4          1
     12003    4 LGWR-LNS wait on channel                              16         85
     12003    1 LGWR wait for redo copy                                1        806
     12003    2 LGWR wait for redo copy                                1     131588
     12003    2 LGWR wait for redo copy                                2       1343
     12003    2 LGWR wait for redo copy                                4        354
     12003    2 LGWR wait for redo copy                                8         27
     12003    2 LGWR wait for redo copy                               16          7
     12003    2 LGWR wait for redo copy                               32          8
     12003    2 LGWR wait for redo copy                               64          2
     12003    2 LGWR wait for redo copy                              128          1
     12003    3 LGWR wait for redo copy                                1        390
     12003    4 LGWR wait for redo copy                                1     567169
     12003    4 LGWR wait for redo copy                                2       2676
     12003    4 LGWR wait for redo copy                                4        825
     12003    4 LGWR wait for redo copy                                8        424
     12003    4 LGWR wait for redo copy                               16        283
     12003    4 LGWR wait for redo copy                               32        191
     12003    4 LGWR wait for redo copy                               64        129
     12003    4 LGWR wait for redo copy                              128         59
     12003    4 LGWR wait for redo copy                              256          7
     12004    2 wait for scn ack                                       1         15
     12004    2 wait for scn ack                                       2         10
     12004    2 wait for scn ack                                       4         10
     12004    2 wait for scn ack                                       8          4
     12004    2 wait for scn ack                                      16          5
     12004    2 wait for scn ack                                      32         10
     12004    2 wait for scn ack                                      64          4
     12004    2 wait for scn ack                                     128          2
     12004    4 wait for scn ack                                       1          8
     12004    4 wait for scn ack                                       2         22
     12004    4 wait for scn ack                                       4        107
     12004    4 wait for scn ack                                       8         46
     12004    4 wait for scn ack                                      16          9
     12004    4 wait for scn ack                                      32         14
     12004    4 wait for scn ack                                      64         37
     12004    4 wait for scn ack                                     128          1
     12004    4 wait for scn ack                                     256          4
     12004    4 wait for scn ack                                     512          6
     12004    4 wait for scn ack                                    1024          5
     12004    4 wait for scn ack                                    2048          5
     12004    1 log file sync                                          1        711
     12004    1 log file sync                                          2         36
     12004    1 log file sync                                          4          6
     12004    1 log file sync                                          8          6
     12004    1 log file sync                                         16          3
     12004    1 log file sync                                         32          2
     12004    1 log file sync                                         64         12
     12004    1 log file sync                                        128          3
     12004    1 log file sync                                       4096          1
     12004    1 log file sync                                       8192          1
     12004    1 log file sync                                      16384          3
     12004    2 log file sync                                          1     356242
     12004    2 log file sync                                          2      24501
     12004    2 log file sync                                          4      13936
     12004    2 log file sync                                          8       6280
     12004    2 log file sync                                         16       4444
     12004    2 log file sync                                         32       3769
     12004    2 log file sync                                         64       3710
     12004    2 log file sync                                        128       1146
     12004    2 log file sync                                        256        397
     12004    2 log file sync                                        512        341
     12004    2 log file sync                                       1024         66
     12004    2 log file sync                                       2048         20
     12004    2 log file sync                                       4096          5
     12004    2 log file sync                                       8192          3
     12004    2 log file sync                                      16384          1
     12004    3 log file sync                                          1        995

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12004    3 log file sync                                          2        417
     12004    3 log file sync                                          4        548
     12004    3 log file sync                                          8         26
     12004    3 log file sync                                         16         17
     12004    3 log file sync                                         32         29
     12004    3 log file sync                                         64         24
     12004    3 log file sync                                        256          1
     12004    4 log file sync                                          1    1170995
     12004    4 log file sync                                          2     122308
     12004    4 log file sync                                          4      60019
     12004    4 log file sync                                          8      27503
     12004    4 log file sync                                         16      20299
     12004    4 log file sync                                         32      18528
     12004    4 log file sync                                         64      17245
     12004    4 log file sync                                        128       7034
     12004    4 log file sync                                        256       2718
     12004    4 log file sync                                        512       1000
     12004    4 log file sync                                       1024        432
     12004    4 log file sync                                       2048        154
     12004    4 log file sync                                       4096         56
     12004    4 log file sync                                       8192          8
     12004    4 log file sync                                      32768          1
     12004    2 log file switch completion                            16          1
     12004    2 log file switch completion                            64          9
     12004    2 log file switch completion                           128          6
     12004    2 log file switch completion                           256          1
     12004    4 log file switch completion                             1          3
     12004    4 log file switch completion                             2          4
     12004    4 log file switch completion                             4          1
     12004    4 log file switch completion                             8          3
     12004    4 log file switch completion                            16          9
     12004    4 log file switch completion                            32         48
     12004    4 log file switch completion                            64        114
     12004    4 log file switch completion                           128        101
     12004    4 log file switch completion                           256         25
     12004    4 log file switch completion                           512          1
     12004    4 log file switch completion                          1024          1
     12004    4 log file switch completion                          2048          1
     12004    1 log file parallel write                                1      15558
     12004    1 log file parallel write                                2        386
     12004    1 log file parallel write                                4        240
     12004    1 log file parallel write                                8         68
     12004    1 log file parallel write                               16         77
     12004    1 log file parallel write                               32         98
     12004    1 log file parallel write                               64         69
     12004    1 log file parallel write                              128         28
     12004    1 log file parallel write                              256          8
     12004    1 log file parallel write                              512          4
     12004    1 log file parallel write                             1024          3
     12004    1 log file parallel write                             2048          2
     12004    1 log file parallel write                             8192          1
     12004    1 log file parallel write                            16384          1
     12004    2 log file parallel write                                1    1274395
     12004    2 log file parallel write                                2      45206
     12004    2 log file parallel write                                4      49517
     12004    2 log file parallel write                                8       9626
     12004    2 log file parallel write                               16      11388
     12004    2 log file parallel write                               32      16846
     12004    2 log file parallel write                               64      16196
     12004    2 log file parallel write                              128       4898
     12004    2 log file parallel write                              256       1270
     12004    2 log file parallel write                              512        430
     12004    2 log file parallel write                             1024        112
     12004    2 log file parallel write                             2048         70
     12004    2 log file parallel write                             4096          9
     12004    2 log file parallel write                             8192          1
     12004    2 log file parallel write                            16384          1
     12004    3 log file parallel write                                1      13257
     12004    3 log file parallel write                                2       1182
     12004    3 log file parallel write                                4        208
     12004    3 log file parallel write                                8         62
     12004    3 log file parallel write                               16         76
     12004    3 log file parallel write                               32        117
     12004    3 log file parallel write                               64         96
     12004    3 log file parallel write                              128         22
     12004    3 log file parallel write                              256         11
     12004    3 log file parallel write                              512          3
     12004    3 log file parallel write                             1024          1
     12004    4 log file parallel write                                1    5314865
     12004    4 log file parallel write                                2     320760
     12004    4 log file parallel write                                4     545815
     12004    4 log file parallel write                                8      65515
     12004    4 log file parallel write                               16      64947
     12004    4 log file parallel write                               32     101055
     12004    4 log file parallel write                               64     103624
     12004    4 log file parallel write                              128      31968
     12004    4 log file parallel write                              256       8269
     12004    4 log file parallel write                              512       2633
     12004    4 log file parallel write                             1024        854
     12004    4 log file parallel write                             2048        355
     12004    4 log file parallel write                             4096         78
     12004    4 log file parallel write                             8192          2
     12004    4 log file parallel write                            16384          1
     12004    1 gcs log flush sync                                     1        416
     12004    1 gcs log flush sync                                     2         44
     12004    1 gcs log flush sync                                     4         30
     12004    1 gcs log flush sync                                     8         20

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12004    1 gcs log flush sync                                    16         23
     12004    2 gcs log flush sync                                     1     204255
     12004    2 gcs log flush sync                                     2      11741
     12004    2 gcs log flush sync                                     4       7097
     12004    2 gcs log flush sync                                     8       5068
     12004    2 gcs log flush sync                                    16       9204
     12004    2 gcs log flush sync                                    32         37
     12004    2 gcs log flush sync                                    64         21
     12004    2 gcs log flush sync                                   128          2
     12004    3 gcs log flush sync                                     1        261
     12004    3 gcs log flush sync                                     2         12
     12004    3 gcs log flush sync                                     4          4
     12004    3 gcs log flush sync                                     8          6
     12004    3 gcs log flush sync                                    16         14
     12004    4 gcs log flush sync                                     1    1235869
     12004    4 gcs log flush sync                                     2      56033
     12004    4 gcs log flush sync                                     4      34431
     12004    4 gcs log flush sync                                     8      24781
     12004    4 gcs log flush sync                                    16      41969
     12004    4 gcs log flush sync                                    32          1
     12004    1 gc current block 2-way                                 1     144362
     12004    1 gc current block 2-way                                 2        167
     12004    1 gc current block 2-way                                 4        136
     12004    1 gc current block 2-way                                 8         94
     12004    1 gc current block 2-way                                16         65
     12004    1 gc current block 2-way                                32         58
     12004    1 gc current block 2-way                                64         26
     12004    1 gc current block 2-way                               128          3
     12004    1 gc current block 2-way                               256          1
     12004    2 gc current block 2-way                                 1    2838978
     12004    2 gc current block 2-way                                 2      15521
     12004    2 gc current block 2-way                                 4      13969
     12004    2 gc current block 2-way                                 8      11526
     12004    2 gc current block 2-way                                16       5618
     12004    2 gc current block 2-way                                32       2071
     12004    2 gc current block 2-way                                64       1394
     12004    2 gc current block 2-way                               128        883
     12004    2 gc current block 2-way                               256        234
     12004    2 gc current block 2-way                               512         36
     12004    2 gc current block 2-way                              1024         21
     12004    2 gc current block 2-way                              2048          6
     12004    2 gc current block 2-way                              4096          4
     12004    2 gc current block 2-way                              8192          1
     12004    2 gc current block 2-way                             32768          3
     12004    2 gc current block 2-way                             65536         13
     12004    2 gc current block 2-way                            131072         26
     12004    2 gc current block 2-way                            262144         18
     12004    3 gc current block 2-way                                 1      95380
     12004    3 gc current block 2-way                                 2        271
     12004    3 gc current block 2-way                                 4        227
     12004    3 gc current block 2-way                                 8        149
     12004    3 gc current block 2-way                                16        147
     12004    3 gc current block 2-way                                32        111
     12004    3 gc current block 2-way                                64         31
     12004    3 gc current block 2-way                               128          7
     12004    4 gc current block 2-way                                 1    7503633
     12004    4 gc current block 2-way                                 2      26838
     12004    4 gc current block 2-way                                 4      12575
     12004    4 gc current block 2-way                                 8       7559
     12004    4 gc current block 2-way                                16       5749
     12004    4 gc current block 2-way                                32       4158
     12004    4 gc current block 2-way                                64       3027
     12004    4 gc current block 2-way                               128       1743
     12004    4 gc current block 2-way                               256        646
     12004    4 gc current block 2-way                               512        211
     12004    4 gc current block 2-way                              1024         69
     12004    4 gc current block 2-way                              2048         20
     12004    4 gc current block 2-way                              4096         15
     12004    4 gc current block 2-way                              8192          8
     12004    4 gc current block 2-way                             16384         12
     12004    4 gc current block 2-way                             32768         13
     12004    4 gc current block 2-way                             65536         16
     12004    4 gc current block 2-way                            131072         33
     12004    4 gc current block 2-way                            262144         24
     12004    1 gc cr grant 2-way                                      1     200669
     12004    1 gc cr grant 2-way                                      2        328
     12004    1 gc cr grant 2-way                                      4        217
     12004    1 gc cr grant 2-way                                      8        163
     12004    1 gc cr grant 2-way                                     16        126
     12004    1 gc cr grant 2-way                                     32         99
     12004    1 gc cr grant 2-way                                     64         39
     12004    1 gc cr grant 2-way                                    128         15
     12004    1 gc cr grant 2-way                                    256          1
     12004    2 gc cr grant 2-way                                      1    3817195
     12004    2 gc cr grant 2-way                                      2      21366
     12004    2 gc cr grant 2-way                                      4      11441
     12004    2 gc cr grant 2-way                                      8       7517
     12004    2 gc cr grant 2-way                                     16       5889
     12004    2 gc cr grant 2-way                                     32       3911
     12004    2 gc cr grant 2-way                                     64       2914
     12004    2 gc cr grant 2-way                                    128       1784
     12004    2 gc cr grant 2-way                                    256        202
     12004    2 gc cr grant 2-way                                    512         21
     12004    2 gc cr grant 2-way                                   1024          4
     12004    2 gc cr grant 2-way                                   2048          7
     12004    2 gc cr grant 2-way                                   4096          6
     12004    2 gc cr grant 2-way                                   8192          1

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12004    2 gc cr grant 2-way                                  16384          9
     12004    2 gc cr grant 2-way                                  32768          7
     12004    2 gc cr grant 2-way                                  65536         29
     12004    2 gc cr grant 2-way                                 131072         95
     12004    2 gc cr grant 2-way                                 262144         52
     12004    3 gc cr grant 2-way                                      1     209814
     12004    3 gc cr grant 2-way                                      2        425
     12004    3 gc cr grant 2-way                                      4        352
     12004    3 gc cr grant 2-way                                      8        221
     12004    3 gc cr grant 2-way                                     16        176
     12004    3 gc cr grant 2-way                                     32        109
     12004    3 gc cr grant 2-way                                     64         45
     12004    3 gc cr grant 2-way                                    128          4
     12004    4 gc cr grant 2-way                                      1   17444480
     12004    4 gc cr grant 2-way                                      2      85488
     12004    4 gc cr grant 2-way                                      4      46107
     12004    4 gc cr grant 2-way                                      8      29403
     12004    4 gc cr grant 2-way                                     16      24454
     12004    4 gc cr grant 2-way                                     32      19702
     12004    4 gc cr grant 2-way                                     64      15064
     12004    4 gc cr grant 2-way                                    128       7409
     12004    4 gc cr grant 2-way                                    256       1257
     12004    4 gc cr grant 2-way                                    512        371
     12004    4 gc cr grant 2-way                                   1024         95
     12004    4 gc cr grant 2-way                                   2048         40
     12004    4 gc cr grant 2-way                                   4096         11
     12004    4 gc cr grant 2-way                                   8192         36
     12004    4 gc cr grant 2-way                                  16384         53
     12004    4 gc cr grant 2-way                                  32768         53
     12004    4 gc cr grant 2-way                                  65536         76
     12004    4 gc cr grant 2-way                                 131072         99
     12004    4 gc cr grant 2-way                                 262144        111
     12004    4 gc cr grant 2-way                                 524288          9
     12004    1 LNS wait on SENDREQ                                    1      14573
     12004    1 LNS wait on SENDREQ                                    2        211
     12004    1 LNS wait on SENDREQ                                    4        278
     12004    1 LNS wait on SENDREQ                                    8        243
     12004    1 LNS wait on SENDREQ                                   16        301
     12004    1 LNS wait on SENDREQ                                   32         22
     12004    1 LNS wait on SENDREQ                                 2048          2
     12004    1 LNS wait on SENDREQ                                 4096          3
     12004    1 LNS wait on SENDREQ                                 8192          2
     12004    1 LNS wait on SENDREQ                                16384          4
     12004    1 LNS wait on SENDREQ                                32768          1
     12004    2 LNS wait on SENDREQ                                    1    1310095
     12004    2 LNS wait on SENDREQ                                    2      28088
     12004    2 LNS wait on SENDREQ                                    4      14662
     12004    2 LNS wait on SENDREQ                                    8      16723
     12004    2 LNS wait on SENDREQ                                   16      41987
     12004    2 LNS wait on SENDREQ                                   32      30317
     12004    2 LNS wait on SENDREQ                                   64        813
     12004    2 LNS wait on SENDREQ                                  128         42
     12004    2 LNS wait on SENDREQ                                  256         52
     12004    2 LNS wait on SENDREQ                                  512         27
     12004    2 LNS wait on SENDREQ                                 1024          8
     12004    2 LNS wait on SENDREQ                                 2048          8
     12004    2 LNS wait on SENDREQ                                 4096          4
     12004    2 LNS wait on SENDREQ                                 8192          2
     12004    2 LNS wait on SENDREQ                                16384          5
     12004    2 LNS wait on SENDREQ                                32768          3
     12004    3 LNS wait on SENDREQ                                    1      12773
     12004    3 LNS wait on SENDREQ                                    2        181
     12004    3 LNS wait on SENDREQ                                    4        148
     12004    3 LNS wait on SENDREQ                                    8        159
     12004    3 LNS wait on SENDREQ                                   16       1137
     12004    3 LNS wait on SENDREQ                                   32         25
     12004    3 LNS wait on SENDREQ                                  512          1
     12004    3 LNS wait on SENDREQ                                 1024          1
     12004    3 LNS wait on SENDREQ                                 4096          2
     12004    3 LNS wait on SENDREQ                                16384          1
     12004    3 LNS wait on SENDREQ                                32768          1
     12004    4 LNS wait on SENDREQ                                    1    5489586
     12004    4 LNS wait on SENDREQ                                    2     106112
     12004    4 LNS wait on SENDREQ                                    4      70427
     12004    4 LNS wait on SENDREQ                                    8      73704
     12004    4 LNS wait on SENDREQ                                   16     285918
     12004    4 LNS wait on SENDREQ                                   32     416298
     12004    4 LNS wait on SENDREQ                                   64      22790
     12004    4 LNS wait on SENDREQ                                  128        397
     12004    4 LNS wait on SENDREQ                                  256       1123
     12004    4 LNS wait on SENDREQ                                  512        817
     12004    4 LNS wait on SENDREQ                                 1024        219
     12004    4 LNS wait on SENDREQ                                 2048        113
     12004    4 LNS wait on SENDREQ                                 4096         70
     12004    4 LNS wait on SENDREQ                                 8192         63
     12004    4 LNS wait on SENDREQ                                16384         35
     12004    4 LNS wait on SENDREQ                                32768         17
     12004    4 LNS wait on SENDREQ                                65536          8
     12004    1 LNS wait on LGWR                                       1          1
     12004    2 LNS wait on LGWR                                       1          1
     12004    3 LNS wait on LGWR                                       1          1
     12004    4 LNS wait on LGWR                                       1          1
     12004    1 LNS wait on DETACH                                     1          1
     12004    2 LNS wait on DETACH                                     1          1
     12004    2 LNS wait on DETACH                                     2          1
     12004    3 LNS wait on DETACH                                     1          1
     12004    4 LNS wait on DETACH                                     1          1

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12004    4 LNS wait on DETACH                                     2          2
     12004    1 LNS wait on ATTACH                                    64          1
     12004    2 LNS wait on ATTACH                                    64          2
     12004    3 LNS wait on ATTACH                                    64          1
     12004    4 LNS wait on ATTACH                                    64          3
     12004    1 LNS ASYNC end of log                                   1       3197
     12004    1 LNS ASYNC end of log                                   2        519
     12004    1 LNS ASYNC end of log                                   4        739
     12004    1 LNS ASYNC end of log                                   8        709
     12004    1 LNS ASYNC end of log                                  16        536
     12004    1 LNS ASYNC end of log                                  32       1241
     12004    1 LNS ASYNC end of log                                  64        896
     12004    1 LNS ASYNC end of log                                 128       2748
     12004    1 LNS ASYNC end of log                                 256       2252
     12004    1 LNS ASYNC end of log                                 512       1304
     12004    1 LNS ASYNC end of log                                1024       1917
     12004    2 LNS ASYNC end of log                                   1     205999
     12004    2 LNS ASYNC end of log                                   2      66959
     12004    2 LNS ASYNC end of log                                   4     140190
     12004    2 LNS ASYNC end of log                                   8     120314
     12004    2 LNS ASYNC end of log                                  16      74045
     12004    2 LNS ASYNC end of log                                  32     193069
     12004    2 LNS ASYNC end of log                                  64     118207
     12004    2 LNS ASYNC end of log                                 128     277227
     12004    2 LNS ASYNC end of log                                 256     109933
     12004    2 LNS ASYNC end of log                                 512      63610
     12004    2 LNS ASYNC end of log                                1024      49747
     12004    2 LNS ASYNC end of log                                2048          1
     12004    3 LNS ASYNC end of log                                   1       3523
     12004    3 LNS ASYNC end of log                                   2        305
     12004    3 LNS ASYNC end of log                                   4        416
     12004    3 LNS ASYNC end of log                                   8        798
     12004    3 LNS ASYNC end of log                                  16        386
     12004    3 LNS ASYNC end of log                                  32        722
     12004    3 LNS ASYNC end of log                                  64       1046
     12004    3 LNS ASYNC end of log                                 128       3208
     12004    3 LNS ASYNC end of log                                 256       1837
     12004    3 LNS ASYNC end of log                                 512       1095
     12004    3 LNS ASYNC end of log                                1024       1702
     12004    4 LNS ASYNC end of log                                   1     892902
     12004    4 LNS ASYNC end of log                                   2     640377
     12004    4 LNS ASYNC end of log                                   4     487506
     12004    4 LNS ASYNC end of log                                   8     487362
     12004    4 LNS ASYNC end of log                                  16     353699
     12004    4 LNS ASYNC end of log                                  32     662210
     12004    4 LNS ASYNC end of log                                  64     521689
     12004    4 LNS ASYNC end of log                                 128    1017477
     12004    4 LNS ASYNC end of log                                 256     477549
     12004    4 LNS ASYNC end of log                                 512     220973
     12004    4 LNS ASYNC end of log                                1024     159927
     12004    4 LNS ASYNC end of log                                2048         22
     12004    1 LGWR-LNS wait on channel                               1          1
     12004    1 LGWR-LNS wait on channel                               8          1
     12004    1 LGWR-LNS wait on channel                              16        188
     12004    3 LGWR-LNS wait on channel                               1          1
     12004    3 LGWR-LNS wait on channel                               8          1
     12004    3 LGWR-LNS wait on channel                              16        156
     12004    4 LGWR-LNS wait on channel                               1          1
     12004    4 LGWR-LNS wait on channel                               4          1
     12004    4 LGWR-LNS wait on channel                              16         85
     12004    1 LGWR wait for redo copy                                1       1445
     12004    2 LGWR wait for redo copy                                1     131716
     12004    2 LGWR wait for redo copy                                2       1343
     12004    2 LGWR wait for redo copy                                4        354
     12004    2 LGWR wait for redo copy                                8         27
     12004    2 LGWR wait for redo copy                               16          7
     12004    2 LGWR wait for redo copy                               32          8
     12004    2 LGWR wait for redo copy                               64          2
     12004    2 LGWR wait for redo copy                              128          1
     12004    3 LGWR wait for redo copy                                1        540
     12004    4 LGWR wait for redo copy                                1     567267
     12004    4 LGWR wait for redo copy                                2       2676
     12004    4 LGWR wait for redo copy                                4        825
     12004    4 LGWR wait for redo copy                                8        424
     12004    4 LGWR wait for redo copy                               16        283
     12004    4 LGWR wait for redo copy                               32        191
     12004    4 LGWR wait for redo copy                               64        129
     12004    4 LGWR wait for redo copy                              128         59
     12004    4 LGWR wait for redo copy                              256          7

ORDERED BY WAIT_TIME_MILLI
Note: This query won't work on 10.2 - ORA-942

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12002    1 log file sync                                          1        625
     12002    1 log file parallel write                                1       8334
     12002    1 gcs log flush sync                                     1        157
     12002    1 gc current block 2-way                                 1      26894
     12002    1 gc cr grant 2-way                                      1      22134
     12002    1 LNS wait on SENDREQ                                    1       7390
     12002    1 LNS wait on LGWR                                       1          1
     12002    1 LNS wait on DETACH                                     1          1
     12002    1 LNS ASYNC end of log                                   1       1735
     12002    1 LGWR-LNS wait on channel                               1          1
     12002    1 LGWR wait for redo copy                                1        784
     12002    2 wait for scn ack                                       1         15
     12002    2 log file sync                                          1     356126
     12002    2 log file parallel write                                1    1261493
     12002    2 gcs log flush sync                                     1     203847
     12002    2 gc current block 2-way                                 1    2824486
     12002    2 gc cr grant 2-way                                      1    3742006
     12002    2 LNS wait on SENDREQ                                    1    1296677
     12002    2 LNS wait on LGWR                                       1          1
     12002    2 LNS wait on DETACH                                     1          1
     12002    2 LNS ASYNC end of log                                   1     203994
     12002    2 LGWR wait for redo copy                                1     130659
     12002    3 log file sync                                          1        335
     12002    3 log file parallel write                                1       6310
     12002    3 gcs log flush sync                                     1        154
     12002    3 gc current block 2-way                                 1      39556
     12002    3 gc cr grant 2-way                                      1     126278
     12002    3 LNS wait on SENDREQ                                    1       5688
     12002    3 LNS wait on LGWR                                       1          1
     12002    3 LNS wait on DETACH                                     1          1
     12002    3 LNS ASYNC end of log                                   1       1196
     12002    3 LGWR-LNS wait on channel                               1          1
     12002    3 LGWR wait for redo copy                                1        163
     12002    4 wait for scn ack                                       1          8
     12002    4 log file sync                                          1    1170647
     12002    4 log file switch completion                             1          3
     12002    4 log file parallel write                                1    5308910
     12002    4 gcs log flush sync                                     1    1235793
     12002    4 gc current block 2-way                                 1    7449033
     12002    4 gc cr grant 2-way                                      1   17336663
     12002    4 LNS wait on SENDREQ                                    1    5483491
     12002    4 LNS wait on LGWR                                       1          1
     12002    4 LNS wait on DETACH                                     1          1
     12002    4 LNS ASYNC end of log                                   1     891665
     12002    4 LGWR-LNS wait on channel                               1          1
     12002    4 LGWR wait for redo copy                                1     567099
     12002    1 log file sync                                          2         23
     12002    1 log file parallel write                                2        213
     12002    1 gcs log flush sync                                     2         27
     12002    1 gc current block 2-way                                 2        117
     12002    1 gc cr grant 2-way                                      2        247
     12002    1 LNS wait on SENDREQ                                    2        104
     12002    1 LNS ASYNC end of log                                   2        263
     12002    2 wait for scn ack                                       2         10
     12002    2 log file sync                                          2      24492
     12002    2 log file parallel write                                2      44862
     12002    2 gcs log flush sync                                     2      11729
     12002    2 gc current block 2-way                                 2      15295
     12002    2 gc cr grant 2-way                                      2      21186
     12002    2 LNS wait on SENDREQ                                    2      28009
     12002    2 LNS wait on DETACH                                     2          1
     12002    2 LNS ASYNC end of log                                   2      66463
     12002    2 LGWR wait for redo copy                                2       1342
     12002    3 log file sync                                          2        399
     12002    3 log file parallel write                                2       1078
     12002    3 gcs log flush sync                                     2          6
     12002    3 gc current block 2-way                                 2        115
     12002    3 gc cr grant 2-way                                      2        343
     12002    3 LNS wait on SENDREQ                                    2        117
     12002    3 LNS ASYNC end of log                                   2        132
     12002    4 wait for scn ack                                       2         22
     12002    4 log file sync                                          2     122295
     12002    4 log file switch completion                             2          4
     12002    4 log file parallel write                                2     320657
     12002    4 gcs log flush sync                                     2      56029
     12002    4 gc current block 2-way                                 2      26745
     12002    4 gc cr grant 2-way                                      2      85427
     12002    4 LNS wait on SENDREQ                                    2     106067
     12002    4 LNS wait on DETACH                                     2          2
     12002    4 LNS ASYNC end of log                                   2     640258
     12002    4 LGWR wait for redo copy                                2       2676
     12002    1 log file sync                                          4          3
     12002    1 log file parallel write                                4        104
     12002    1 gcs log flush sync                                     4         21
     12002    1 gc current block 2-way                                 4         70
     12002    1 gc cr grant 2-way                                      4        174
     12002    1 LNS wait on SENDREQ                                    4        218
     12002    1 LNS ASYNC end of log                                   4        362
     12002    2 wait for scn ack                                       4         10
     12002    2 log file sync                                          4      13935
     12002    2 log file parallel write                                4      49280
     12002    2 gcs log flush sync                                     4       7086
     12002    2 gc current block 2-way                                 4      13799
     12002    2 gc cr grant 2-way                                      4      11313
     12002    2 LNS wait on SENDREQ                                    4      14588
     12002    2 LNS ASYNC end of log                                   4     138525
     12002    2 LGWR wait for redo copy                                4        354

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12002    3 log file sync                                          4        545
     12002    3 log file parallel write                                4        137
     12002    3 gcs log flush sync                                     4          3
     12002    3 gc current block 2-way                                 4         70
     12002    3 gc cr grant 2-way                                      4        284
     12002    3 LNS wait on SENDREQ                                    4        109
     12002    3 LNS ASYNC end of log                                   4        237
     12002    4 wait for scn ack                                       4        107
     12002    4 log file sync                                          4      60014
     12002    4 log file switch completion                             4          1
     12002    4 log file parallel write                                4     545733
     12002    4 gcs log flush sync                                     4      34429
     12002    4 gc current block 2-way                                 4      12496
     12002    4 gc cr grant 2-way                                      4      46059
     12002    4 LNS wait on SENDREQ                                    4      70403
     12002    4 LNS ASYNC end of log                                   4     487397
     12002    4 LGWR-LNS wait on channel                               4          1
     12002    4 LGWR wait for redo copy                                4        825
     12002    1 log file sync                                          8          3
     12002    1 log file parallel write                                8         37
     12002    1 gcs log flush sync                                     8          7
     12002    1 gc current block 2-way                                 8         45
     12002    1 gc cr grant 2-way                                      8        129
     12002    1 LNS wait on SENDREQ                                    8        186
     12002    1 LNS ASYNC end of log                                   8        332
     12002    1 LGWR-LNS wait on channel                               8          1
     12002    2 wait for scn ack                                       8          4
     12002    2 log file sync                                          8       6279
     12002    2 log file parallel write                                8       9533
     12002    2 gcs log flush sync                                     8       5048
     12002    2 gc current block 2-way                                 8      11406
     12002    2 gc cr grant 2-way                                      8       7412
     12002    2 LNS wait on SENDREQ                                    8      16679
     12002    2 LNS ASYNC end of log                                   8     116539
     12002    2 LGWR wait for redo copy                                8         27
     12002    3 log file sync                                          8         20
     12002    3 log file parallel write                                8         25
     12002    3 gcs log flush sync                                     8          5
     12002    3 gc current block 2-way                                 8         45
     12002    3 gc cr grant 2-way                                      8        180
     12002    3 LNS wait on SENDREQ                                    8        131
     12002    3 LNS ASYNC end of log                                   8        562
     12002    3 LGWR-LNS wait on channel                               8          1
     12002    4 wait for scn ack                                       8         46
     12002    4 log file sync                                          8      27500
     12002    4 log file switch completion                             8          3
     12002    4 log file parallel write                                8      65481
     12002    4 gcs log flush sync                                     8      24781
     12002    4 gc current block 2-way                                 8       7529
     12002    4 gc cr grant 2-way                                      8      29375
     12002    4 LNS wait on SENDREQ                                    8      73682
     12002    4 LNS ASYNC end of log                                   8     487178
     12002    4 LGWR wait for redo copy                                8        424
     12002    1 log file sync                                         16          2
     12002    1 log file parallel write                               16         41
     12002    1 gcs log flush sync                                    16          5
     12002    1 gc current block 2-way                                16         19
     12002    1 gc cr grant 2-way                                     16        102
     12002    1 LNS wait on SENDREQ                                   16        130
     12002    1 LNS ASYNC end of log                                  16        283
     12002    1 LGWR-LNS wait on channel                              16        188
     12002    2 wait for scn ack                                      16          5
     12002    2 log file sync                                         16       4442
     12002    2 log file switch completion                            16          1
     12002    2 log file parallel write                               16      11339
     12002    2 gcs log flush sync                                    16       9133
     12002    2 gc current block 2-way                                16       5506
     12002    2 gc cr grant 2-way                                     16       5835
     12002    2 LNS wait on SENDREQ                                   16      41921
     12002    2 LNS ASYNC end of log                                  16      73469
     12002    2 LGWR wait for redo copy                               16          7
     12002    3 log file sync                                         16         11
     12002    3 log file parallel write                               16         52
     12002    3 gcs log flush sync                                    16          3
     12002    3 gc current block 2-way                                16         60
     12002    3 gc cr grant 2-way                                     16        140
     12002    3 LNS wait on SENDREQ                                   16       1081
     12002    3 LNS ASYNC end of log                                  16        199
     12002    3 LGWR-LNS wait on channel                              16        156
     12002    4 wait for scn ack                                      16          9
     12002    4 log file sync                                         16      20298
     12002    4 log file switch completion                            16          9
     12002    4 log file parallel write                               16      64925
     12002    4 gcs log flush sync                                    16      41969
     12002    4 gc current block 2-way                                16       5717
     12002    4 gc cr grant 2-way                                     16      24435
     12002    4 LNS wait on SENDREQ                                   16     285893
     12002    4 LNS ASYNC end of log                                  16     353539
     12002    4 LGWR-LNS wait on channel                              16         85
     12002    4 LGWR wait for redo copy                               16        283
     12002    1 log file sync                                         32          1
     12002    1 log file parallel write                               32         58
     12002    1 gc current block 2-way                                32         22
     12002    1 gc cr grant 2-way                                     32         75
     12002    1 LNS wait on SENDREQ                                   32          7
     12002    1 LNS ASYNC end of log                                  32        573
     12002    2 wait for scn ack                                      32         10

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12002    2 log file sync                                         32       3768
     12002    2 log file parallel write                               32      16788
     12002    2 gcs log flush sync                                    32         37
     12002    2 gc current block 2-way                                32       1999
     12002    2 gc cr grant 2-way                                     32       3859
     12002    2 LNS wait on SENDREQ                                   32      30267
     12002    2 LNS ASYNC end of log                                  32     191678
     12002    2 LGWR wait for redo copy                               32          8
     12002    3 log file sync                                         32         18
     12002    3 log file parallel write                               32         75
     12002    3 gc current block 2-way                                32         53
     12002    3 gc cr grant 2-way                                     32         86
     12002    3 LNS wait on SENDREQ                                   32         11
     12002    3 LNS ASYNC end of log                                  32        344
     12002    4 wait for scn ack                                      32         14
     12002    4 log file sync                                         32      18526
     12002    4 log file switch completion                            32         48
     12002    4 log file parallel write                               32     101034
     12002    4 gcs log flush sync                                    32          1
     12002    4 gc current block 2-way                                32       4144
     12002    4 gc cr grant 2-way                                     32      19692
     12002    4 LNS wait on SENDREQ                                   32     416297
     12002    4 LNS ASYNC end of log                                  32     661911
     12002    4 LGWR wait for redo copy                               32        191
     12002    1 log file sync                                         64          9
     12002    1 log file parallel write                               64         42
     12002    1 gc current block 2-way                                64          8
     12002    1 gc cr grant 2-way                                     64         23
     12002    1 LNS wait on ATTACH                                    64          1
     12002    1 LNS ASYNC end of log                                  64        464
     12002    2 wait for scn ack                                      64          4
     12002    2 log file sync                                         64       3710
     12002    2 log file switch completion                            64          9
     12002    2 log file parallel write                               64      16147
     12002    2 gcs log flush sync                                    64         21
     12002    2 gc current block 2-way                                64       1356
     12002    2 gc cr grant 2-way                                     64       2888
     12002    2 LNS wait on SENDREQ                                   64        813
     12002    2 LNS wait on ATTACH                                    64          2
     12002    2 LNS ASYNC end of log                                  64     117758
     12002    2 LGWR wait for redo copy                               64          2
     12002    3 log file sync                                         64         21
     12002    3 log file parallel write                               64         60
     12002    3 gc current block 2-way                                64          8
     12002    3 gc cr grant 2-way                                     64         38
     12002    3 LNS wait on ATTACH                                    64          1
     12002    3 LNS ASYNC end of log                                  64        649
     12002    4 wait for scn ack                                      64         37
     12002    4 log file sync                                         64      17243
     12002    4 log file switch completion                            64        114
     12002    4 log file parallel write                               64     103602
     12002    4 gc current block 2-way                                64       3015
     12002    4 gc cr grant 2-way                                     64      15051
     12002    4 LNS wait on SENDREQ                                   64      22790
     12002    4 LNS wait on ATTACH                                    64          3
     12002    4 LNS ASYNC end of log                                  64     521300
     12002    4 LGWR wait for redo copy                               64        129
     12002    1 log file sync                                        128          1
     12002    1 log file parallel write                              128         13
     12002    1 gc current block 2-way                               128          2
     12002    1 gc cr grant 2-way                                    128          8
     12002    1 LNS ASYNC end of log                                 128       1612
     12002    2 wait for scn ack                                     128          2
     12002    2 log file sync                                        128       1146
     12002    2 log file switch completion                           128          6
     12002    2 log file parallel write                              128       4886
     12002    2 gcs log flush sync                                   128          2
     12002    2 gc current block 2-way                               128        871
     12002    2 gc cr grant 2-way                                    128       1777
     12002    2 LNS wait on SENDREQ                                  128         42
     12002    2 LNS ASYNC end of log                                 128     276371
     12002    2 LGWR wait for redo copy                              128          1
     12002    3 log file parallel write                              128         11
     12002    3 gc cr grant 2-way                                    128          2
     12002    3 LNS ASYNC end of log                                 128       2070
     12002    4 wait for scn ack                                     128          1
     12002    4 log file sync                                        128       7034
     12002    4 log file switch completion                           128        101
     12002    4 log file parallel write                              128      31966
     12002    4 gc current block 2-way                               128       1737
     12002    4 gc cr grant 2-way                                    128       7406
     12002    4 LNS wait on SENDREQ                                  128        397
     12002    4 LNS ASYNC end of log                                 128    1016317
     12002    4 LGWR wait for redo copy                              128         59
     12002    1 log file parallel write                              256          5
     12002    1 LNS ASYNC end of log                                 256       1411
     12002    2 log file sync                                        256        397
     12002    2 log file switch completion                           256          1
     12002    2 log file parallel write                              256       1267
     12002    2 gc current block 2-way                               256        232
     12002    2 gc cr grant 2-way                                    256        201
     12002    2 LNS wait on SENDREQ                                  256         52
     12002    2 LNS ASYNC end of log                                 256     109123
     12002    3 log file parallel write                              256          8
     12002    3 LNS ASYNC end of log                                 256       1022
     12002    4 wait for scn ack                                     256          4
     12002    4 log file sync                                        256       2718

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12002    4 log file switch completion                           256         25
     12002    4 log file parallel write                              256       8268
     12002    4 gc current block 2-way                               256        646
     12002    4 gc cr grant 2-way                                    256       1257
     12002    4 LNS wait on SENDREQ                                  256       1123
     12002    4 LNS ASYNC end of log                                 256     476596
     12002    4 LGWR wait for redo copy                              256          7
     12002    1 log file parallel write                              512          2
     12002    1 LNS ASYNC end of log                                 512        590
     12002    2 log file sync                                        512        341
     12002    2 log file parallel write                              512        428
     12002    2 gc current block 2-way                               512         36
     12002    2 gc cr grant 2-way                                    512         21
     12002    2 LNS wait on SENDREQ                                  512         27
     12002    2 LNS ASYNC end of log                                 512      62935
     12002    3 log file parallel write                              512          1
     12002    3 LNS ASYNC end of log                                 512        454
     12002    4 wait for scn ack                                     512          6
     12002    4 log file sync                                        512       1000
     12002    4 log file switch completion                           512          1
     12002    4 log file parallel write                              512       2633
     12002    4 gc current block 2-way                               512        211
     12002    4 gc cr grant 2-way                                    512        371
     12002    4 LNS wait on SENDREQ                                  512        817
     12002    4 LNS ASYNC end of log                                 512     220230
     12002    1 log file parallel write                             1024          1
     12002    1 LNS ASYNC end of log                                1024        495
     12002    2 log file sync                                       1024         65
     12002    2 log file parallel write                             1024        111
     12002    2 gc current block 2-way                              1024         21
     12002    2 gc cr grant 2-way                                   1024          4
     12002    2 LNS wait on SENDREQ                                 1024          8
     12002    2 LNS ASYNC end of log                                1024      48327
     12002    3 log file parallel write                             1024          1
     12002    3 LNS ASYNC end of log                                1024        273
     12002    4 wait for scn ack                                    1024          5
     12002    4 log file sync                                       1024        432
     12002    4 log file switch completion                          1024          1
     12002    4 log file parallel write                             1024        854
     12002    4 gc current block 2-way                              1024         69
     12002    4 gc cr grant 2-way                                   1024         95
     12002    4 LNS wait on SENDREQ                                 1024        219
     12002    4 LNS ASYNC end of log                                1024     158545
     12002    1 log file parallel write                             2048          1
     12002    1 LNS wait on SENDREQ                                 2048          1
     12002    2 log file sync                                       2048         20
     12002    2 log file parallel write                             2048         70
     12002    2 gc current block 2-way                              2048          6
     12002    2 gc cr grant 2-way                                   2048          7
     12002    2 LNS wait on SENDREQ                                 2048          6
     12002    2 LNS ASYNC end of log                                2048          1
     12002    4 wait for scn ack                                    2048          5
     12002    4 log file sync                                       2048        154
     12002    4 log file switch completion                          2048          1
     12002    4 log file parallel write                             2048        355
     12002    4 gc current block 2-way                              2048         20
     12002    4 gc cr grant 2-way                                   2048         40
     12002    4 LNS wait on SENDREQ                                 2048        113
     12002    4 LNS ASYNC end of log                                2048         22
     12002    1 log file sync                                       4096          1
     12002    1 LNS wait on SENDREQ                                 4096          2
     12002    2 log file sync                                       4096          5
     12002    2 log file parallel write                             4096          9
     12002    2 gc current block 2-way                              4096          4
     12002    2 gc cr grant 2-way                                   4096          6
     12002    2 LNS wait on SENDREQ                                 4096          3
     12002    3 LNS wait on SENDREQ                                 4096          1
     12002    4 log file sync                                       4096         56
     12002    4 log file parallel write                             4096         78
     12002    4 gc current block 2-way                              4096         15
     12002    4 gc cr grant 2-way                                   4096         11
     12002    4 LNS wait on SENDREQ                                 4096         67
     12002    1 log file sync                                       8192          1
     12002    1 log file parallel write                             8192          1
     12002    1 LNS wait on SENDREQ                                 8192          1
     12002    2 log file sync                                       8192          3
     12002    2 log file parallel write                             8192          1
     12002    2 gc current block 2-way                              8192          1
     12002    2 gc cr grant 2-way                                   8192          1
     12002    2 LNS wait on SENDREQ                                 8192          2
     12002    4 log file sync                                       8192          8
     12002    4 log file parallel write                             8192          2
     12002    4 gc current block 2-way                              8192          8
     12002    4 gc cr grant 2-way                                   8192         36
     12002    4 LNS wait on SENDREQ                                 8192         63
     12002    1 log file sync                                      16384          3
     12002    1 log file parallel write                            16384          1
     12002    1 LNS wait on SENDREQ                                16384          4
     12002    2 log file sync                                      16384          1
     12002    2 log file parallel write                            16384          1
     12002    2 gc cr grant 2-way                                  16384          9
     12002    2 LNS wait on SENDREQ                                16384          5
     12002    3 LNS wait on SENDREQ                                16384          1
     12002    4 log file parallel write                            16384          1
     12002    4 gc current block 2-way                             16384         12
     12002    4 gc cr grant 2-way                                  16384         53
     12002    4 LNS wait on SENDREQ                                16384         35

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12002    1 LNS wait on SENDREQ                                32768          1
     12002    2 gc current block 2-way                             32768          3
     12002    2 gc cr grant 2-way                                  32768          7
     12002    2 LNS wait on SENDREQ                                32768          3
     12002    3 LNS wait on SENDREQ                                32768          1
     12002    4 log file sync                                      32768          1
     12002    4 gc current block 2-way                             32768         13
     12002    4 gc cr grant 2-way                                  32768         53
     12002    4 LNS wait on SENDREQ                                32768         17
     12002    2 gc current block 2-way                             65536         13
     12002    2 gc cr grant 2-way                                  65536         29
     12002    4 gc current block 2-way                             65536         16
     12002    4 gc cr grant 2-way                                  65536         76
     12002    4 LNS wait on SENDREQ                                65536          8
     12002    2 gc current block 2-way                            131072         26
     12002    2 gc cr grant 2-way                                 131072         95
     12002    4 gc current block 2-way                            131072         33
     12002    4 gc cr grant 2-way                                 131072         99
     12002    2 gc current block 2-way                            262144         18
     12002    2 gc cr grant 2-way                                 262144         52
     12002    4 gc current block 2-way                            262144         24
     12002    4 gc cr grant 2-way                                 262144        111
     12002    4 gc cr grant 2-way                                 524288          9
     12003    1 log file sync                                          1        657
     12003    1 log file parallel write                                1      11937
     12003    1 gcs log flush sync                                     1        354
     12003    1 gc current block 2-way                                 1     119619
     12003    1 gc cr grant 2-way                                      1      63124
     12003    1 LNS wait on SENDREQ                                    1      11127
     12003    1 LNS wait on LGWR                                       1          1
     12003    1 LNS wait on DETACH                                     1          1
     12003    1 LNS ASYNC end of log                                   1       2116
     12003    1 LGWR-LNS wait on channel                               1          1
     12003    1 LGWR wait for redo copy                                1        806
     12003    2 wait for scn ack                                       1         15
     12003    2 log file sync                                          1     356156
     12003    2 log file parallel write                                1    1271644
     12003    2 gcs log flush sync                                     1     204113
     12003    2 gc current block 2-way                                 1    2830869
     12003    2 gc cr grant 2-way                                      1    3815007
     12003    2 LNS wait on SENDREQ                                    1    1307328
     12003    2 LNS wait on LGWR                                       1          1
     12003    2 LNS wait on DETACH                                     1          1
     12003    2 LNS ASYNC end of log                                   1     205354
     12003    2 LGWR wait for redo copy                                1     131588
     12003    3 log file sync                                          1        626
     12003    3 log file parallel write                                1      10619
     12003    3 gcs log flush sync                                     1        180
     12003    3 gc current block 2-way                                 1      84245
     12003    3 gc cr grant 2-way                                      1     137695
     12003    3 LNS wait on SENDREQ                                    1      10119
     12003    3 LNS wait on LGWR                                       1          1
     12003    3 LNS wait on DETACH                                     1          1
     12003    3 LNS ASYNC end of log                                   1       2659
     12003    3 LGWR-LNS wait on channel                               1          1
     12003    3 LGWR wait for redo copy                                1        390
     12003    4 wait for scn ack                                       1          8
     12003    4 log file sync                                          1    1170870
     12003    4 log file switch completion                             1          3
     12003    4 log file parallel write                                1    5312453
     12003    4 gcs log flush sync                                     1    1235826
     12003    4 gc current block 2-way                                 1    7463763
     12003    4 gc cr grant 2-way                                      1   17371923
     12003    4 LNS wait on SENDREQ                                    1    5487196
     12003    4 LNS wait on LGWR                                       1          1
     12003    4 LNS wait on DETACH                                     1          1
     12003    4 LNS ASYNC end of log                                   1     892381
     12003    4 LGWR-LNS wait on channel                               1          1
     12003    4 LGWR wait for redo copy                                1     567169
     12003    1 log file sync                                          2         27
     12003    1 log file parallel write                                2        305
     12003    1 gcs log flush sync                                     2         38
     12003    1 gc current block 2-way                                 2        135
     12003    1 gc cr grant 2-way                                      2        302
     12003    1 LNS wait on SENDREQ                                    2        128
     12003    1 LNS ASYNC end of log                                   2        370
     12003    2 wait for scn ack                                       2         10
     12003    2 log file sync                                          2      24494
     12003    2 log file parallel write                                2      45167
     12003    2 gcs log flush sync                                     2      11738
     12003    2 gc current block 2-way                                 2      15364
     12003    2 gc cr grant 2-way                                      2      21351
     12003    2 LNS wait on SENDREQ                                    2      28068
     12003    2 LNS wait on DETACH                                     2          1
     12003    2 LNS ASYNC end of log                                   2      66865
     12003    2 LGWR wait for redo copy                                2       1343
     12003    3 log file sync                                          2        406
     12003    3 log file parallel write                                2       1157
     12003    3 gcs log flush sync                                     2          8
     12003    3 gc current block 2-way                                 2        169
     12003    3 gc cr grant 2-way                                      2        401
     12003    3 LNS wait on SENDREQ                                    2        157
     12003    3 LNS ASYNC end of log                                   2        240
     12003    4 wait for scn ack                                       2         22
     12003    4 log file sync                                          2     122305
     12003    4 log file switch completion                             2          4
     12003    4 log file parallel write                                2     320741

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12003    4 gcs log flush sync                                     2      56029
     12003    4 gc current block 2-way                                 2      26832
     12003    4 gc cr grant 2-way                                      2      85470
     12003    4 LNS wait on SENDREQ                                    2     106085
     12003    4 LNS wait on DETACH                                     2          2
     12003    4 LNS ASYNC end of log                                   2     640332
     12003    4 LGWR wait for redo copy                                2       2676
     12003    1 log file sync                                          4          3
     12003    1 log file parallel write                                4        146
     12003    1 gcs log flush sync                                     4         29
     12003    1 gc current block 2-way                                 4        106
     12003    1 gc cr grant 2-way                                      4        204
     12003    1 LNS wait on SENDREQ                                    4        242
     12003    1 LNS ASYNC end of log                                   4        532
     12003    2 wait for scn ack                                       4         10
     12003    2 log file sync                                          4      13935
     12003    2 log file parallel write                                4      49485
     12003    2 gcs log flush sync                                     4       7097
     12003    2 gc current block 2-way                                 4      13842
     12003    2 gc cr grant 2-way                                      4      11424
     12003    2 LNS wait on SENDREQ                                    4      14644
     12003    2 LNS ASYNC end of log                                   4     140123
     12003    2 LGWR wait for redo copy                                4        354
     12003    3 log file sync                                          4        547
     12003    3 log file parallel write                                4        183
     12003    3 gcs log flush sync                                     4          3
     12003    3 gc current block 2-way                                 4        114
     12003    3 gc cr grant 2-way                                      4        331
     12003    3 LNS wait on SENDREQ                                    4        127
     12003    3 LNS ASYNC end of log                                   4        356
     12003    4 wait for scn ack                                       4        107
     12003    4 log file sync                                          4      60019
     12003    4 log file switch completion                             4          1
     12003    4 log file parallel write                                4     545806
     12003    4 gcs log flush sync                                     4      34431
     12003    4 gc current block 2-way                                 4      12560
     12003    4 gc cr grant 2-way                                      4      46090
     12003    4 LNS wait on SENDREQ                                    4      70410
     12003    4 LNS ASYNC end of log                                   4     487476
     12003    4 LGWR-LNS wait on channel                               4          1
     12003    4 LGWR wait for redo copy                                4        825
     12003    1 log file sync                                          8          5
     12003    1 log file parallel write                                8         56
     12003    1 gcs log flush sync                                     8         20
     12003    1 gc current block 2-way                                 8         74
     12003    1 gc cr grant 2-way                                      8        151
     12003    1 LNS wait on SENDREQ                                    8        208
     12003    1 LNS ASYNC end of log                                   8        542
     12003    1 LGWR-LNS wait on channel                               8          1
     12003    2 wait for scn ack                                       8          4
     12003    2 log file sync                                          8       6280
     12003    2 log file parallel write                                8       9617
     12003    2 gcs log flush sync                                     8       5066
     12003    2 gc current block 2-way                                 8      11447
     12003    2 gc cr grant 2-way                                      8       7501
     12003    2 LNS wait on SENDREQ                                    8      16700
     12003    2 LNS ASYNC end of log                                   8     120264
     12003    2 LGWR wait for redo copy                                8         27
     12003    3 log file sync                                          8         21
     12003    3 log file parallel write                                8         49
     12003    3 gcs log flush sync                                     8          5
     12003    3 gc current block 2-way                                 8         79
     12003    3 gc cr grant 2-way                                      8        205
     12003    3 LNS wait on SENDREQ                                    8        151
     12003    3 LNS ASYNC end of log                                   8        745
     12003    3 LGWR-LNS wait on channel                               8          1
     12003    4 wait for scn ack                                       8         46
     12003    4 log file sync                                          8      27502
     12003    4 log file switch completion                             8          3
     12003    4 log file parallel write                                8      65508
     12003    4 gcs log flush sync                                     8      24781
     12003    4 gc current block 2-way                                 8       7559
     12003    4 gc cr grant 2-way                                      8      29394
     12003    4 LNS wait on SENDREQ                                    8      73695
     12003    4 LNS ASYNC end of log                                   8     487328
     12003    4 LGWR wait for redo copy                                8        424
     12003    1 log file sync                                         16          2
     12003    1 log file parallel write                               16         63
     12003    1 gcs log flush sync                                    16         23
     12003    1 gc current block 2-way                                16         44
     12003    1 gc cr grant 2-way                                     16        119
     12003    1 LNS wait on SENDREQ                                   16        147
     12003    1 LNS ASYNC end of log                                  16        466
     12003    1 LGWR-LNS wait on channel                              16        188
     12003    2 wait for scn ack                                      16          5
     12003    2 log file sync                                         16       4442
     12003    2 log file switch completion                            16          1
     12003    2 log file parallel write                               16      11380
     12003    2 gcs log flush sync                                    16       9201
     12003    2 gc current block 2-way                                16       5542
     12003    2 gc cr grant 2-way                                     16       5884
     12003    2 LNS wait on SENDREQ                                   16      41945
     12003    2 LNS ASYNC end of log                                  16      73985
     12003    2 LGWR wait for redo copy                               16          7
     12003    3 log file sync                                         16         13
     12003    3 log file parallel write                               16         66
     12003    3 gcs log flush sync                                    16          9

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12003    3 gc current block 2-way                                16         92
     12003    3 gc cr grant 2-way                                     16        165
     12003    3 LNS wait on SENDREQ                                   16       1100
     12003    3 LNS ASYNC end of log                                  16        333
     12003    3 LGWR-LNS wait on channel                              16        156
     12003    4 wait for scn ack                                      16          9
     12003    4 log file sync                                         16      20299
     12003    4 log file switch completion                            16          9
     12003    4 log file parallel write                               16      64941
     12003    4 gcs log flush sync                                    16      41969
     12003    4 gc current block 2-way                                16       5743
     12003    4 gc cr grant 2-way                                     16      24447
     12003    4 LNS wait on SENDREQ                                   16     285910
     12003    4 LNS ASYNC end of log                                  16     353660
     12003    4 LGWR-LNS wait on channel                              16         85
     12003    4 LGWR wait for redo copy                               16        283
     12003    1 log file sync                                         32          2
     12003    1 log file parallel write                               32         82
     12003    1 gc current block 2-way                                32         38
     12003    1 gc cr grant 2-way                                     32         92
     12003    1 LNS wait on SENDREQ                                   32          7
     12003    1 LNS ASYNC end of log                                  32        851
     12003    2 wait for scn ack                                      32         10
     12003    2 log file sync                                         32       3769
     12003    2 log file parallel write                               32      16824
     12003    2 gcs log flush sync                                    32         37
     12003    2 gc current block 2-way                                32       2026
     12003    2 gc cr grant 2-way                                     32       3907
     12003    2 LNS wait on SENDREQ                                   32      30301
     12003    2 LNS ASYNC end of log                                  32     192953
     12003    2 LGWR wait for redo copy                               32          8
     12003    3 log file sync                                         32         23
     12003    3 log file parallel write                               32         96
     12003    3 gc current block 2-way                                32         77
     12003    3 gc cr grant 2-way                                     32        103
     12003    3 LNS wait on SENDREQ                                   32         13
     12003    3 LNS ASYNC end of log                                  32        607
     12003    4 wait for scn ack                                      32         14
     12003    4 log file sync                                         32      18527
     12003    4 log file switch completion                            32         48
     12003    4 log file parallel write                               32     101043
     12003    4 gcs log flush sync                                    32          1
     12003    4 gc current block 2-way                                32       4158
     12003    4 gc cr grant 2-way                                     32      19702
     12003    4 LNS wait on SENDREQ                                   32     416297
     12003    4 LNS ASYNC end of log                                  32     662123
     12003    4 LGWR wait for redo copy                               32        191
     12003    1 log file sync                                         64          9
     12003    1 log file parallel write                               64         55
     12003    1 gc current block 2-way                                64         21
     12003    1 gc cr grant 2-way                                     64         29
     12003    1 LNS wait on ATTACH                                    64          1
     12003    1 LNS ASYNC end of log                                  64        744
     12003    2 wait for scn ack                                      64          4
     12003    2 log file sync                                         64       3710
     12003    2 log file switch completion                            64          9
     12003    2 log file parallel write                               64      16183
     12003    2 gcs log flush sync                                    64         21
     12003    2 gc current block 2-way                                64       1374
     12003    2 gc cr grant 2-way                                     64       2911
     12003    2 LNS wait on SENDREQ                                   64        813
     12003    2 LNS wait on ATTACH                                    64          2
     12003    2 LNS ASYNC end of log                                  64     118049
     12003    2 LGWR wait for redo copy                               64          2
     12003    3 log file sync                                         64         21
     12003    3 log file parallel write                               64         83
     12003    3 gc current block 2-way                                64         16
     12003    3 gc cr grant 2-way                                     64         43
     12003    3 LNS wait on ATTACH                                    64          1
     12003    3 LNS ASYNC end of log                                  64        897
     12003    4 wait for scn ack                                      64         37
     12003    4 log file sync                                         64      17245
     12003    4 log file switch completion                            64        114
     12003    4 log file parallel write                               64     103614
     12003    4 gc current block 2-way                                64       3027
     12003    4 gc cr grant 2-way                                     64      15064
     12003    4 LNS wait on SENDREQ                                   64      22790
     12003    4 LNS wait on ATTACH                                    64          3
     12003    4 LNS ASYNC end of log                                  64     521549
     12003    4 LGWR wait for redo copy                               64        129
     12003    1 log file sync                                        128          1
     12003    1 log file parallel write                              128         23
     12003    1 gc current block 2-way                               128          2
     12003    1 gc cr grant 2-way                                    128         12
     12003    1 LNS ASYNC end of log                                 128       2507
     12003    2 wait for scn ack                                     128          2
     12003    2 log file sync                                        128       1146
     12003    2 log file switch completion                           128          6
     12003    2 log file parallel write                              128       4897
     12003    2 gcs log flush sync                                   128          2
     12003    2 gc current block 2-way                               128        876
     12003    2 gc cr grant 2-way                                    128       1784
     12003    2 LNS wait on SENDREQ                                  128         42
     12003    2 LNS ASYNC end of log                                 128     276842
     12003    2 LGWR wait for redo copy                              128          1
     12003    3 log file parallel write                              128         20
     12003    3 gc current block 2-way                               128          5

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12003    3 gc cr grant 2-way                                    128          4
     12003    3 LNS ASYNC end of log                                 128       2885
     12003    4 wait for scn ack                                     128          1
     12003    4 log file sync                                        128       7034
     12003    4 log file switch completion                           128        101
     12003    4 log file parallel write                              128      31967
     12003    4 gc current block 2-way                               128       1742
     12003    4 gc cr grant 2-way                                    128       7409
     12003    4 LNS wait on SENDREQ                                  128        397
     12003    4 LNS ASYNC end of log                                 128    1017134
     12003    4 LGWR wait for redo copy                              128         59
     12003    1 log file parallel write                              256          8
     12003    1 gc current block 2-way                               256          1
     12003    1 gc cr grant 2-way                                    256          1
     12003    1 LNS ASYNC end of log                                 256       1896
     12003    2 log file sync                                        256        397
     12003    2 log file switch completion                           256          1
     12003    2 log file parallel write                              256       1270
     12003    2 gc current block 2-way                               256        234
     12003    2 gc cr grant 2-way                                    256        202
     12003    2 LNS wait on SENDREQ                                  256         52
     12003    2 LNS ASYNC end of log                                 256     109549
     12003    3 log file sync                                        256          1
     12003    3 log file parallel write                              256         11
     12003    3 LNS ASYNC end of log                                 256       1532
     12003    4 wait for scn ack                                     256          4
     12003    4 log file sync                                        256       2718
     12003    4 log file switch completion                           256         25
     12003    4 log file parallel write                              256       8269
     12003    4 gc current block 2-way                               256        646
     12003    4 gc cr grant 2-way                                    256       1257
     12003    4 LNS wait on SENDREQ                                  256       1123
     12003    4 LNS ASYNC end of log                                 256     477194
     12003    4 LGWR wait for redo copy                              256          7
     12003    1 log file parallel write                              512          4
     12003    1 LNS ASYNC end of log                                 512        929
     12003    2 log file sync                                        512        341
     12003    2 log file parallel write                              512        430
     12003    2 gc current block 2-way                               512         36
     12003    2 gc cr grant 2-way                                    512         21
     12003    2 LNS wait on SENDREQ                                  512         27
     12003    2 LNS ASYNC end of log                                 512      63237
     12003    3 log file parallel write                              512          3
     12003    3 LNS ASYNC end of log                                 512        741
     12003    4 wait for scn ack                                     512          6
     12003    4 log file sync                                        512       1000
     12003    4 log file switch completion                           512          1
     12003    4 log file parallel write                              512       2633
     12003    4 gc current block 2-way                               512        211
     12003    4 gc cr grant 2-way                                    512        371
     12003    4 LNS wait on SENDREQ                                  512        817
     12003    4 LNS ASYNC end of log                                 512     220530
     12003    1 log file parallel write                             1024          3
     12003    1 LNS ASYNC end of log                                1024       1174
     12003    2 log file sync                                       1024         66
     12003    2 log file parallel write                             1024        112
     12003    2 gc current block 2-way                              1024         21
     12003    2 gc cr grant 2-way                                   1024          4
     12003    2 LNS wait on SENDREQ                                 1024          8
     12003    2 LNS ASYNC end of log                                1024      49004
     12003    3 log file parallel write                             1024          1
     12003    3 LNS ASYNC end of log                                1024        950
     12003    4 wait for scn ack                                    1024          5
     12003    4 log file sync                                       1024        432
     12003    4 log file switch completion                          1024          1
     12003    4 log file parallel write                             1024        854
     12003    4 gc current block 2-way                              1024         69
     12003    4 gc cr grant 2-way                                   1024         95
     12003    4 LNS wait on SENDREQ                                 1024        219
     12003    4 LNS ASYNC end of log                                1024     159213
     12003    1 log file parallel write                             2048          2
     12003    1 LNS wait on SENDREQ                                 2048          1
     12003    2 log file sync                                       2048         20
     12003    2 log file parallel write                             2048         70
     12003    2 gc current block 2-way                              2048          6
     12003    2 gc cr grant 2-way                                   2048          7
     12003    2 LNS wait on SENDREQ                                 2048          6
     12003    2 LNS ASYNC end of log                                2048          1
     12003    4 wait for scn ack                                    2048          5
     12003    4 log file sync                                       2048        154
     12003    4 log file switch completion                          2048          1
     12003    4 log file parallel write                             2048        355
     12003    4 gc current block 2-way                              2048         20
     12003    4 gc cr grant 2-way                                   2048         40
     12003    4 LNS wait on SENDREQ                                 2048        113
     12003    4 LNS ASYNC end of log                                2048         22
     12003    1 log file sync                                       4096          1
     12003    1 LNS wait on SENDREQ                                 4096          2
     12003    2 log file sync                                       4096          5
     12003    2 log file parallel write                             4096          9
     12003    2 gc current block 2-way                              4096          4
     12003    2 gc cr grant 2-way                                   4096          6
     12003    2 LNS wait on SENDREQ                                 4096          3
     12003    3 LNS wait on SENDREQ                                 4096          1
     12003    4 log file sync                                       4096         56
     12003    4 log file parallel write                             4096         78
     12003    4 gc current block 2-way                              4096         15

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12003    4 gc cr grant 2-way                                   4096         11
     12003    4 LNS wait on SENDREQ                                 4096         67
     12003    1 log file sync                                       8192          1
     12003    1 log file parallel write                             8192          1
     12003    1 LNS wait on SENDREQ                                 8192          1
     12003    2 log file sync                                       8192          3
     12003    2 log file parallel write                             8192          1
     12003    2 gc current block 2-way                              8192          1
     12003    2 gc cr grant 2-way                                   8192          1
     12003    2 LNS wait on SENDREQ                                 8192          2
     12003    4 log file sync                                       8192          8
     12003    4 log file parallel write                             8192          2
     12003    4 gc current block 2-way                              8192          8
     12003    4 gc cr grant 2-way                                   8192         36
     12003    4 LNS wait on SENDREQ                                 8192         63
     12003    1 log file sync                                      16384          3
     12003    1 log file parallel write                            16384          1
     12003    1 LNS wait on SENDREQ                                16384          4
     12003    2 log file sync                                      16384          1
     12003    2 log file parallel write                            16384          1
     12003    2 gc cr grant 2-way                                  16384          9
     12003    2 LNS wait on SENDREQ                                16384          5
     12003    3 LNS wait on SENDREQ                                16384          1
     12003    4 log file parallel write                            16384          1
     12003    4 gc current block 2-way                             16384         12
     12003    4 gc cr grant 2-way                                  16384         53
     12003    4 LNS wait on SENDREQ                                16384         35
     12003    1 LNS wait on SENDREQ                                32768          1
     12003    2 gc current block 2-way                             32768          3
     12003    2 gc cr grant 2-way                                  32768          7
     12003    2 LNS wait on SENDREQ                                32768          3
     12003    3 LNS wait on SENDREQ                                32768          1
     12003    4 log file sync                                      32768          1
     12003    4 gc current block 2-way                             32768         13
     12003    4 gc cr grant 2-way                                  32768         53
     12003    4 LNS wait on SENDREQ                                32768         17
     12003    2 gc current block 2-way                             65536         13
     12003    2 gc cr grant 2-way                                  65536         29
     12003    4 gc current block 2-way                             65536         16
     12003    4 gc cr grant 2-way                                  65536         76
     12003    4 LNS wait on SENDREQ                                65536          8
     12003    2 gc current block 2-way                            131072         26
     12003    2 gc cr grant 2-way                                 131072         95
     12003    4 gc current block 2-way                            131072         33
     12003    4 gc cr grant 2-way                                 131072         99
     12003    2 gc current block 2-way                            262144         18
     12003    2 gc cr grant 2-way                                 262144         52
     12003    4 gc current block 2-way                            262144         24
     12003    4 gc cr grant 2-way                                 262144        111
     12003    4 gc cr grant 2-way                                 524288          9
     12004    1 log file sync                                          1        711
     12004    1 log file parallel write                                1      15558
     12004    1 gcs log flush sync                                     1        416
     12004    1 gc current block 2-way                                 1     144362
     12004    1 gc cr grant 2-way                                      1     200669
     12004    1 LNS wait on SENDREQ                                    1      14573
     12004    1 LNS wait on LGWR                                       1          1
     12004    1 LNS wait on DETACH                                     1          1
     12004    1 LNS ASYNC end of log                                   1       3197
     12004    1 LGWR-LNS wait on channel                               1          1
     12004    1 LGWR wait for redo copy                                1       1445
     12004    2 wait for scn ack                                       1         15
     12004    2 log file sync                                          1     356242
     12004    2 log file parallel write                                1    1274395
     12004    2 gcs log flush sync                                     1     204255
     12004    2 gc current block 2-way                                 1    2838978
     12004    2 gc cr grant 2-way                                      1    3817195
     12004    2 LNS wait on SENDREQ                                    1    1310095
     12004    2 LNS wait on LGWR                                       1          1
     12004    2 LNS wait on DETACH                                     1          1
     12004    2 LNS ASYNC end of log                                   1     205999
     12004    2 LGWR wait for redo copy                                1     131716
     12004    3 log file sync                                          1        995
     12004    3 log file parallel write                                1      13257
     12004    3 gcs log flush sync                                     1        261
     12004    3 gc current block 2-way                                 1      95380
     12004    3 gc cr grant 2-way                                      1     209814
     12004    3 LNS wait on SENDREQ                                    1      12773
     12004    3 LNS wait on LGWR                                       1          1
     12004    3 LNS wait on DETACH                                     1          1
     12004    3 LNS ASYNC end of log                                   1       3523
     12004    3 LGWR-LNS wait on channel                               1          1
     12004    3 LGWR wait for redo copy                                1        540
     12004    4 wait for scn ack                                       1          8
     12004    4 log file sync                                          1    1170995
     12004    4 log file switch completion                             1          3
     12004    4 log file parallel write                                1    5314865
     12004    4 gcs log flush sync                                     1    1235869
     12004    4 gc current block 2-way                                 1    7503633
     12004    4 gc cr grant 2-way                                      1   17444480
     12004    4 LNS wait on SENDREQ                                    1    5489586
     12004    4 LNS wait on LGWR                                       1          1
     12004    4 LNS wait on DETACH                                     1          1
     12004    4 LNS ASYNC end of log                                   1     892902
     12004    4 LGWR-LNS wait on channel                               1          1
     12004    4 LGWR wait for redo copy                                1     567267
     12004    1 log file sync                                          2         36

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12004    1 log file parallel write                                2        386
     12004    1 gcs log flush sync                                     2         44
     12004    1 gc current block 2-way                                 2        167
     12004    1 gc cr grant 2-way                                      2        328
     12004    1 LNS wait on SENDREQ                                    2        211
     12004    1 LNS ASYNC end of log                                   2        519
     12004    2 wait for scn ack                                       2         10
     12004    2 log file sync                                          2      24501
     12004    2 log file parallel write                                2      45206
     12004    2 gcs log flush sync                                     2      11741
     12004    2 gc current block 2-way                                 2      15521
     12004    2 gc cr grant 2-way                                      2      21366
     12004    2 LNS wait on SENDREQ                                    2      28088
     12004    2 LNS wait on DETACH                                     2          1
     12004    2 LNS ASYNC end of log                                   2      66959
     12004    2 LGWR wait for redo copy                                2       1343
     12004    3 log file sync                                          2        417
     12004    3 log file parallel write                                2       1182
     12004    3 gcs log flush sync                                     2         12
     12004    3 gc current block 2-way                                 2        271
     12004    3 gc cr grant 2-way                                      2        425
     12004    3 LNS wait on SENDREQ                                    2        181
     12004    3 LNS ASYNC end of log                                   2        305
     12004    4 wait for scn ack                                       2         22
     12004    4 log file sync                                          2     122308
     12004    4 log file switch completion                             2          4
     12004    4 log file parallel write                                2     320760
     12004    4 gcs log flush sync                                     2      56033
     12004    4 gc current block 2-way                                 2      26838
     12004    4 gc cr grant 2-way                                      2      85488
     12004    4 LNS wait on SENDREQ                                    2     106112
     12004    4 LNS wait on DETACH                                     2          2
     12004    4 LNS ASYNC end of log                                   2     640377
     12004    4 LGWR wait for redo copy                                2       2676
     12004    1 log file sync                                          4          6
     12004    1 log file parallel write                                4        240
     12004    1 gcs log flush sync                                     4         30
     12004    1 gc current block 2-way                                 4        136
     12004    1 gc cr grant 2-way                                      4        217
     12004    1 LNS wait on SENDREQ                                    4        278
     12004    1 LNS ASYNC end of log                                   4        739
     12004    2 wait for scn ack                                       4         10
     12004    2 log file sync                                          4      13936
     12004    2 log file parallel write                                4      49517
     12004    2 gcs log flush sync                                     4       7097
     12004    2 gc current block 2-way                                 4      13969
     12004    2 gc cr grant 2-way                                      4      11441
     12004    2 LNS wait on SENDREQ                                    4      14662
     12004    2 LNS ASYNC end of log                                   4     140190
     12004    2 LGWR wait for redo copy                                4        354
     12004    3 log file sync                                          4        548
     12004    3 log file parallel write                                4        208
     12004    3 gcs log flush sync                                     4          4
     12004    3 gc current block 2-way                                 4        227
     12004    3 gc cr grant 2-way                                      4        352
     12004    3 LNS wait on SENDREQ                                    4        148
     12004    3 LNS ASYNC end of log                                   4        416
     12004    4 wait for scn ack                                       4        107
     12004    4 log file sync                                          4      60019
     12004    4 log file switch completion                             4          1
     12004    4 log file parallel write                                4     545815
     12004    4 gcs log flush sync                                     4      34431
     12004    4 gc current block 2-way                                 4      12575
     12004    4 gc cr grant 2-way                                      4      46107
     12004    4 LNS wait on SENDREQ                                    4      70427
     12004    4 LNS ASYNC end of log                                   4     487506
     12004    4 LGWR-LNS wait on channel                               4          1
     12004    4 LGWR wait for redo copy                                4        825
     12004    1 log file sync                                          8          6
     12004    1 log file parallel write                                8         68
     12004    1 gcs log flush sync                                     8         20
     12004    1 gc current block 2-way                                 8         94
     12004    1 gc cr grant 2-way                                      8        163
     12004    1 LNS wait on SENDREQ                                    8        243
     12004    1 LNS ASYNC end of log                                   8        709
     12004    1 LGWR-LNS wait on channel                               8          1
     12004    2 wait for scn ack                                       8          4
     12004    2 log file sync                                          8       6280
     12004    2 log file parallel write                                8       9626
     12004    2 gcs log flush sync                                     8       5068
     12004    2 gc current block 2-way                                 8      11526
     12004    2 gc cr grant 2-way                                      8       7517
     12004    2 LNS wait on SENDREQ                                    8      16723
     12004    2 LNS ASYNC end of log                                   8     120314
     12004    2 LGWR wait for redo copy                                8         27
     12004    3 log file sync                                          8         26
     12004    3 log file parallel write                                8         62
     12004    3 gcs log flush sync                                     8          6
     12004    3 gc current block 2-way                                 8        149
     12004    3 gc cr grant 2-way                                      8        221
     12004    3 LNS wait on SENDREQ                                    8        159
     12004    3 LNS ASYNC end of log                                   8        798
     12004    3 LGWR-LNS wait on channel                               8          1
     12004    4 wait for scn ack                                       8         46
     12004    4 log file sync                                          8      27503
     12004    4 log file switch completion                             8          3
     12004    4 log file parallel write                                8      65515

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12004    4 gcs log flush sync                                     8      24781
     12004    4 gc current block 2-way                                 8       7559
     12004    4 gc cr grant 2-way                                      8      29403
     12004    4 LNS wait on SENDREQ                                    8      73704
     12004    4 LNS ASYNC end of log                                   8     487362
     12004    4 LGWR wait for redo copy                                8        424
     12004    1 log file sync                                         16          3
     12004    1 log file parallel write                               16         77
     12004    1 gcs log flush sync                                    16         23
     12004    1 gc current block 2-way                                16         65
     12004    1 gc cr grant 2-way                                     16        126
     12004    1 LNS wait on SENDREQ                                   16        301
     12004    1 LNS ASYNC end of log                                  16        536
     12004    1 LGWR-LNS wait on channel                              16        188
     12004    2 wait for scn ack                                      16          5
     12004    2 log file sync                                         16       4444
     12004    2 log file switch completion                            16          1
     12004    2 log file parallel write                               16      11388
     12004    2 gcs log flush sync                                    16       9204
     12004    2 gc current block 2-way                                16       5618
     12004    2 gc cr grant 2-way                                     16       5889
     12004    2 LNS wait on SENDREQ                                   16      41987
     12004    2 LNS ASYNC end of log                                  16      74045
     12004    2 LGWR wait for redo copy                               16          7
     12004    3 log file sync                                         16         17
     12004    3 log file parallel write                               16         76
     12004    3 gcs log flush sync                                    16         14
     12004    3 gc current block 2-way                                16        147
     12004    3 gc cr grant 2-way                                     16        176
     12004    3 LNS wait on SENDREQ                                   16       1137
     12004    3 LNS ASYNC end of log                                  16        386
     12004    3 LGWR-LNS wait on channel                              16        156
     12004    4 wait for scn ack                                      16          9
     12004    4 log file sync                                         16      20299
     12004    4 log file switch completion                            16          9
     12004    4 log file parallel write                               16      64947
     12004    4 gcs log flush sync                                    16      41969
     12004    4 gc current block 2-way                                16       5749
     12004    4 gc cr grant 2-way                                     16      24454
     12004    4 LNS wait on SENDREQ                                   16     285918
     12004    4 LNS ASYNC end of log                                  16     353699
     12004    4 LGWR-LNS wait on channel                              16         85
     12004    4 LGWR wait for redo copy                               16        283
     12004    1 log file sync                                         32          2
     12004    1 log file parallel write                               32         98
     12004    1 gc current block 2-way                                32         58
     12004    1 gc cr grant 2-way                                     32         99
     12004    1 LNS wait on SENDREQ                                   32         22
     12004    1 LNS ASYNC end of log                                  32       1241
     12004    2 wait for scn ack                                      32         10
     12004    2 log file sync                                         32       3769
     12004    2 log file parallel write                               32      16846
     12004    2 gcs log flush sync                                    32         37
     12004    2 gc current block 2-way                                32       2071
     12004    2 gc cr grant 2-way                                     32       3911
     12004    2 LNS wait on SENDREQ                                   32      30317
     12004    2 LNS ASYNC end of log                                  32     193069
     12004    2 LGWR wait for redo copy                               32          8
     12004    3 log file sync                                         32         29
     12004    3 log file parallel write                               32        117
     12004    3 gc current block 2-way                                32        111
     12004    3 gc cr grant 2-way                                     32        109
     12004    3 LNS wait on SENDREQ                                   32         25
     12004    3 LNS ASYNC end of log                                  32        722
     12004    4 wait for scn ack                                      32         14
     12004    4 log file sync                                         32      18528
     12004    4 log file switch completion                            32         48
     12004    4 log file parallel write                               32     101055
     12004    4 gcs log flush sync                                    32          1
     12004    4 gc current block 2-way                                32       4158
     12004    4 gc cr grant 2-way                                     32      19702
     12004    4 LNS wait on SENDREQ                                   32     416298
     12004    4 LNS ASYNC end of log                                  32     662210
     12004    4 LGWR wait for redo copy                               32        191
     12004    1 log file sync                                         64         12
     12004    1 log file parallel write                               64         69
     12004    1 gc current block 2-way                                64         26
     12004    1 gc cr grant 2-way                                     64         39
     12004    1 LNS wait on ATTACH                                    64          1
     12004    1 LNS ASYNC end of log                                  64        896
     12004    2 wait for scn ack                                      64          4
     12004    2 log file sync                                         64       3710
     12004    2 log file switch completion                            64          9
     12004    2 log file parallel write                               64      16196
     12004    2 gcs log flush sync                                    64         21
     12004    2 gc current block 2-way                                64       1394
     12004    2 gc cr grant 2-way                                     64       2914
     12004    2 LNS wait on SENDREQ                                   64        813
     12004    2 LNS wait on ATTACH                                    64          2
     12004    2 LNS ASYNC end of log                                  64     118207
     12004    2 LGWR wait for redo copy                               64          2
     12004    3 log file sync                                         64         24
     12004    3 log file parallel write                               64         96
     12004    3 gc current block 2-way                                64         31
     12004    3 gc cr grant 2-way                                     64         45
     12004    3 LNS wait on ATTACH                                    64          1
     12004    3 LNS ASYNC end of log                                  64       1046

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12004    4 wait for scn ack                                      64         37
     12004    4 log file sync                                         64      17245
     12004    4 log file switch completion                            64        114
     12004    4 log file parallel write                               64     103624
     12004    4 gc current block 2-way                                64       3027
     12004    4 gc cr grant 2-way                                     64      15064
     12004    4 LNS wait on SENDREQ                                   64      22790
     12004    4 LNS wait on ATTACH                                    64          3
     12004    4 LNS ASYNC end of log                                  64     521689
     12004    4 LGWR wait for redo copy                               64        129
     12004    1 log file sync                                        128          3
     12004    1 log file parallel write                              128         28
     12004    1 gc current block 2-way                               128          3
     12004    1 gc cr grant 2-way                                    128         15
     12004    1 LNS ASYNC end of log                                 128       2748
     12004    2 wait for scn ack                                     128          2
     12004    2 log file sync                                        128       1146
     12004    2 log file switch completion                           128          6
     12004    2 log file parallel write                              128       4898
     12004    2 gcs log flush sync                                   128          2
     12004    2 gc current block 2-way                               128        883
     12004    2 gc cr grant 2-way                                    128       1784
     12004    2 LNS wait on SENDREQ                                  128         42
     12004    2 LNS ASYNC end of log                                 128     277227
     12004    2 LGWR wait for redo copy                              128          1
     12004    3 log file parallel write                              128         22
     12004    3 gc current block 2-way                               128          7
     12004    3 gc cr grant 2-way                                    128          4
     12004    3 LNS ASYNC end of log                                 128       3208
     12004    4 wait for scn ack                                     128          1
     12004    4 log file sync                                        128       7034
     12004    4 log file switch completion                           128        101
     12004    4 log file parallel write                              128      31968
     12004    4 gc current block 2-way                               128       1743
     12004    4 gc cr grant 2-way                                    128       7409
     12004    4 LNS wait on SENDREQ                                  128        397
     12004    4 LNS ASYNC end of log                                 128    1017477
     12004    4 LGWR wait for redo copy                              128         59
     12004    1 log file parallel write                              256          8
     12004    1 gc current block 2-way                               256          1
     12004    1 gc cr grant 2-way                                    256          1
     12004    1 LNS ASYNC end of log                                 256       2252
     12004    2 log file sync                                        256        397
     12004    2 log file switch completion                           256          1
     12004    2 log file parallel write                              256       1270
     12004    2 gc current block 2-way                               256        234
     12004    2 gc cr grant 2-way                                    256        202
     12004    2 LNS wait on SENDREQ                                  256         52
     12004    2 LNS ASYNC end of log                                 256     109933
     12004    3 log file sync                                        256          1
     12004    3 log file parallel write                              256         11
     12004    3 LNS ASYNC end of log                                 256       1837
     12004    4 wait for scn ack                                     256          4
     12004    4 log file sync                                        256       2718
     12004    4 log file switch completion                           256         25
     12004    4 log file parallel write                              256       8269
     12004    4 gc current block 2-way                               256        646
     12004    4 gc cr grant 2-way                                    256       1257
     12004    4 LNS wait on SENDREQ                                  256       1123
     12004    4 LNS ASYNC end of log                                 256     477549
     12004    4 LGWR wait for redo copy                              256          7
     12004    1 log file parallel write                              512          4
     12004    1 LNS ASYNC end of log                                 512       1304
     12004    2 log file sync                                        512        341
     12004    2 log file parallel write                              512        430
     12004    2 gc current block 2-way                               512         36
     12004    2 gc cr grant 2-way                                    512         21
     12004    2 LNS wait on SENDREQ                                  512         27
     12004    2 LNS ASYNC end of log                                 512      63610
     12004    3 log file parallel write                              512          3
     12004    3 LNS wait on SENDREQ                                  512          1
     12004    3 LNS ASYNC end of log                                 512       1095
     12004    4 wait for scn ack                                     512          6
     12004    4 log file sync                                        512       1000
     12004    4 log file switch completion                           512          1
     12004    4 log file parallel write                              512       2633
     12004    4 gc current block 2-way                               512        211
     12004    4 gc cr grant 2-way                                    512        371
     12004    4 LNS wait on SENDREQ                                  512        817
     12004    4 LNS ASYNC end of log                                 512     220973
     12004    1 log file parallel write                             1024          3
     12004    1 LNS ASYNC end of log                                1024       1917
     12004    2 log file sync                                       1024         66
     12004    2 log file parallel write                             1024        112
     12004    2 gc current block 2-way                              1024         21
     12004    2 gc cr grant 2-way                                   1024          4
     12004    2 LNS wait on SENDREQ                                 1024          8
     12004    2 LNS ASYNC end of log                                1024      49747
     12004    3 log file parallel write                             1024          1
     12004    3 LNS wait on SENDREQ                                 1024          1
     12004    3 LNS ASYNC end of log                                1024       1702
     12004    4 wait for scn ack                                    1024          5
     12004    4 log file sync                                       1024        432
     12004    4 log file switch completion                          1024          1
     12004    4 log file parallel write                             1024        854
     12004    4 gc current block 2-way                              1024         69
     12004    4 gc cr grant 2-way                                   1024         95

   SNAP_ID INST NAME                                     WAIT_TIME_MILLI WAIT_COUNT
---------- ---- ---------------------------------------- --------------- ----------
     12004    4 LNS wait on SENDREQ                                 1024        219
     12004    4 LNS ASYNC end of log                                1024     159927
     12004    1 log file parallel write                             2048          2
     12004    1 LNS wait on SENDREQ                                 2048          2
     12004    2 log file sync                                       2048         20
     12004    2 log file parallel write                             2048         70
     12004    2 gc current block 2-way                              2048          6
     12004    2 gc cr grant 2-way                                   2048          7
     12004    2 LNS wait on SENDREQ                                 2048          8
     12004    2 LNS ASYNC end of log                                2048          1
     12004    4 wait for scn ack                                    2048          5
     12004    4 log file sync                                       2048        154
     12004    4 log file switch completion                          2048          1
     12004    4 log file parallel write                             2048        355
     12004    4 gc current block 2-way                              2048         20
     12004    4 gc cr grant 2-way                                   2048         40
     12004    4 LNS wait on SENDREQ                                 2048        113
     12004    4 LNS ASYNC end of log                                2048         22
     12004    1 log file sync                                       4096          1
     12004    1 LNS wait on SENDREQ                                 4096          3
     12004    2 log file sync                                       4096          5
     12004    2 log file parallel write                             4096          9
     12004    2 gc current block 2-way                              4096          4
     12004    2 gc cr grant 2-way                                   4096          6
     12004    2 LNS wait on SENDREQ                                 4096          4
     12004    3 LNS wait on SENDREQ                                 4096          2
     12004    4 log file sync                                       4096         56
     12004    4 log file parallel write                             4096         78
     12004    4 gc current block 2-way                              4096         15
     12004    4 gc cr grant 2-way                                   4096         11
     12004    4 LNS wait on SENDREQ                                 4096         70
     12004    1 log file sync                                       8192          1
     12004    1 log file parallel write                             8192          1
     12004    1 LNS wait on SENDREQ                                 8192          2
     12004    2 log file sync                                       8192          3
     12004    2 log file parallel write                             8192          1
     12004    2 gc current block 2-way                              8192          1
     12004    2 gc cr grant 2-way                                   8192          1
     12004    2 LNS wait on SENDREQ                                 8192          2
     12004    4 log file sync                                       8192          8
     12004    4 log file parallel write                             8192          2
     12004    4 gc current block 2-way                              8192          8
     12004    4 gc cr grant 2-way                                   8192         36
     12004    4 LNS wait on SENDREQ                                 8192         63
     12004    1 log file sync                                      16384          3
     12004    1 log file parallel write                            16384          1
     12004    1 LNS wait on SENDREQ                                16384          4
     12004    2 log file sync                                      16384          1
     12004    2 log file parallel write                            16384          1
     12004    2 gc cr grant 2-way                                  16384          9
     12004    2 LNS wait on SENDREQ                                16384          5
     12004    3 LNS wait on SENDREQ                                16384          1
     12004    4 log file parallel write                            16384          1
     12004    4 gc current block 2-way                             16384         12
     12004    4 gc cr grant 2-way                                  16384         53
     12004    4 LNS wait on SENDREQ                                16384         35
     12004    1 LNS wait on SENDREQ                                32768          1
     12004    2 gc current block 2-way                             32768          3
     12004    2 gc cr grant 2-way                                  32768          7
     12004    2 LNS wait on SENDREQ                                32768          3
     12004    3 LNS wait on SENDREQ                                32768          1
     12004    4 log file sync                                      32768          1
     12004    4 gc current block 2-way                             32768         13
     12004    4 gc cr grant 2-way                                  32768         53
     12004    4 LNS wait on SENDREQ                                32768         17
     12004    2 gc current block 2-way                             65536         13
     12004    2 gc cr grant 2-way                                  65536         29
     12004    4 gc current block 2-way                             65536         16
     12004    4 gc cr grant 2-way                                  65536         76
     12004    4 LNS wait on SENDREQ                                65536          8
     12004    2 gc current block 2-way                            131072         26
     12004    2 gc cr grant 2-way                                 131072         95
     12004    4 gc current block 2-way                            131072         33
     12004    4 gc cr grant 2-way                                 131072         99
     12004    2 gc current block 2-way                            262144         18
     12004    2 gc cr grant 2-way                                 262144         52
     12004    4 gc current block 2-way                            262144         24
     12004    4 gc cr grant 2-way                                 262144        111
     12004    4 gc cr grant 2-way                                 524288          9

ASH DETAILS FOR WORST MINUTES:

APPROACH: If you cannot determine the problem from the data
above, you may need to look at the details of what each session
is doing during each 'bad' snap. Most likely you will want to
note the times of the high log file sync waits, look at what
LGWR is doing at those times, and go from there...

SAMPLE_TIME               INST SESSION_ID PROGRAM                                       EVENT                          TIME_WAITED
------------------------- ---- ---------- --------------------------------------------- ------------------------------ -----------
P1                                       P2                                       P3
---------------------------------------- ---------------------------------------- ----------------------------------------
01-OCT-12 01.11.02.480 AM    2        982 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   library cache: mutex X              10.866
idn: 891844779                           value: 5050881540096                     where: 4

01-OCT-12 01.11.02.480 AM    2       1172 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   library cache: mutex X              10.860
idn: 891844779                           value: 5050881540096                     where: 4

01-OCT-12 01.11.12.521 AM    2        982 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   library cache: mutex X              11.818
idn: 923095243                           value: 5330054414336                     where: 106

01-OCT-12 01.11.13.521 AM    2       1368 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   log file sync                         .807
buffer#: 89280                           sync scn: 3422961631                     : 0

01-OCT-12 01.11.13.521 AM    2       1431 oracle@racnode1.us.oracle.com (LGWR)         log file parallel write               .693
files: 2                                 blocks: 14                               requests: 2

01-OCT-12 01.11.15.521 AM    2        916 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   library cache: mutex X              11.313
idn: 2423010972                          value: 3375844294656                     where: 1

01-OCT-12 01.11.24.541 AM    2          3 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    106.108
type|mode: 1230372869                    id1: 1398361667                          id2: 10

01-OCT-12 01.11.24.541 AM    2          7 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.304
type|mode: 1230372869                    id1: 1398361667                          id2: 6

01-OCT-12 01.11.24.541 AM    2          8 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    104.922
type|mode: 1230372869                    id1: 1398361667                          id2: 4

01-OCT-12 01.11.24.541 AM    2         71 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.354
type|mode: 1230372869                    id1: 1398361667                          id2: 41

01-OCT-12 01.11.24.541 AM    2         72 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.061
type|mode: 1230372869                    id1: 1280262987                          id2: 47

01-OCT-12 01.11.24.541 AM    2        136 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.180
type|mode: 1230372869                    id1: 1398361667                          id2: 33

01-OCT-12 01.11.24.541 AM    2        137 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    104.572
type|mode: 1230372869                    id1: 1398361667                          id2: 11

01-OCT-12 01.11.24.541 AM    2        200 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.052
type|mode: 1230372869                    id1: 1280262987                          id2: 39

01-OCT-12 01.11.24.541 AM    2        203 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.968
type|mode: 1230372869                    id1: 1398361667                          id2: 59

01-OCT-12 01.11.24.541 AM    2        266 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.425
type|mode: 1230372869                    id1: 1280262987                          id2: 1

01-OCT-12 01.11.24.541 AM    2        268 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    106.720
type|mode: 1230372869                    id1: 1280262987                          id2: 64

01-OCT-12 01.11.24.541 AM    2        331 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.076
type|mode: 1230372869                    id1: 1398361667                          id2: 46

01-OCT-12 01.11.24.541 AM    2        332 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    106.348
type|mode: 1230372869                    id1: 1280262987                          id2: 38

01-OCT-12 01.11.24.541 AM    2        395 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.405
type|mode: 1230372869                    id1: 1280262987                          id2: 29

01-OCT-12 01.11.24.541 AM    2        396 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.451
type|mode: 1230372869                    id1: 1280262987                          id2: 34

01-OCT-12 01.11.24.541 AM    2        460 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.194
type|mode: 1230372869                    id1: 1280262987                          id2: 60

01-OCT-12 01.11.24.541 AM    2        465 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    106.000
type|mode: 1230372869                    id1: 1280262987                          id2: 62

01-OCT-12 01.11.24.541 AM    2        525 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.414
type|mode: 1230372869                    id1: 1398361667                          id2: 30

01-OCT-12 01.11.24.541 AM    2        526 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   reliable message                   230.909
channel context: 18464876448             channel handle: 18534671064              broadcast message: 17527392560

01-OCT-12 01.11.24.541 AM    2        590 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    106.129
type|mode: 1230372869                    id1: 1280262987                          id2: 19

01-OCT-12 01.11.24.541 AM    2        591 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   reliable message                   223.551
channel context: 18464876448             channel handle: 18534671864              broadcast message: 17601837016

01-OCT-12 01.11.24.541 AM    2        592 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.286
type|mode: 1230372869                    id1: 1280262987                          id2: 35

01-OCT-12 01.11.24.541 AM    2        655 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    106.170
type|mode: 1230372869                    id1: 1280262987                          id2: 12

01-OCT-12 01.11.24.541 AM    2        656 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   reliable message                   221.005
channel context: 18464876448             channel handle: 18534672664              broadcast message: 17494114856

01-OCT-12 01.11.24.541 AM    2        720 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   reliable message                   223.817
channel context: 18464876448             channel handle: 18534673464              broadcast message: 17601836120

01-OCT-12 01.11.24.541 AM    2        722 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.205
type|mode: 1230372869                    id1: 1280262987                          id2: 58

SAMPLE_TIME               INST SESSION_ID PROGRAM                                       EVENT                          TIME_WAITED
------------------------- ---- ---------- --------------------------------------------- ------------------------------ -----------
P1                                       P2                                       P3
---------------------------------------- ---------------------------------------- ----------------------------------------

01-OCT-12 01.11.24.541 AM    2        786 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   reliable message                   216.092
channel context: 18464876448             channel handle: 18534674288              broadcast message: 17601840632

01-OCT-12 01.11.24.541 AM    2        788 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.342
type|mode: 1230372869                    id1: 1280262987                          id2: 37

01-OCT-12 01.11.24.541 AM    2        848 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    106.420
type|mode: 1230372869                    id1: 1398361667                          id2: 50

01-OCT-12 01.11.24.541 AM    2        849 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   reliable message                   228.816
channel context: 18464876448             channel handle: 18534637200              broadcast message: 17601841544

01-OCT-12 01.11.24.541 AM    2        851 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   reliable message                   216.148
channel context: 18464876448             channel handle: 18534675088              broadcast message: 17601839736

01-OCT-12 01.11.24.541 AM    2        914 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.151
type|mode: 1230372869                    id1: 1280262987                          id2: 13

01-OCT-12 01.11.24.541 AM    2        916 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   reliable message                   214.348
channel context: 18464876448             channel handle: 18534675888              broadcast message: 17527270144

01-OCT-12 01.11.24.541 AM    2        917 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    104.740
type|mode: 1230372869                    id1: 1280262987                          id2: 5

01-OCT-12 01.11.24.541 AM    2        982 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   reliable message                   211.401
channel context: 18464876448             channel handle: 18534676688              broadcast message: 17527399792

01-OCT-12 01.11.24.541 AM    2        983 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.622
type|mode: 1230372869                    id1: 1280262987                          id2: 17

01-OCT-12 01.11.24.541 AM    2       1044 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.454
type|mode: 1230372869                    id1: 1280262987                          id2: 25

01-OCT-12 01.11.24.541 AM    2       1046 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.674
type|mode: 1230372869                    id1: 1398361667                          id2: 51

01-OCT-12 01.11.24.541 AM    2       1047 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   reliable message                   213.379
channel context: 18464876448             channel handle: 18534677512              broadcast message: 17638472256

01-OCT-12 01.11.24.541 AM    2       1110 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.718
type|mode: 1230372869                    id1: 1280262987                          id2: 42

01-OCT-12 01.11.24.541 AM    2       1111 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   reliable message                   215.866
channel context: 18464876448             channel handle: 18534639624              broadcast message: 17494115752

01-OCT-12 01.11.24.541 AM    2       1112 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   reliable message                   227.831
channel context: 18464876448             channel handle: 18534678312              broadcast message: 17601837928

01-OCT-12 01.11.24.541 AM    2       1172 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   reliable message                   211.303
channel context: 18464876448             channel handle: 18534679112              broadcast message: 17527393472

01-OCT-12 01.11.24.541 AM    2       1176 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   reliable message                   208.539
channel context: 18464876448             channel handle: 18534641624              broadcast message: 17638474960

01-OCT-12 01.11.24.541 AM    2       1177 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.748
type|mode: 1230372869                    id1: 1280262987                          id2: 22

01-OCT-12 01.11.24.541 AM    2       1241 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   reliable message                   209.399
channel context: 18464876448             channel handle: 18534679912              broadcast message: 17527391664

01-OCT-12 01.11.24.541 AM    2       1242 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.475
type|mode: 1230372869                    id1: 1398361667                          id2: 8

01-OCT-12 01.11.24.541 AM    2       1307 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.285
type|mode: 1230372869                    id1: 1280262987                          id2: 2

01-OCT-12 01.11.24.541 AM    2       1308 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   reliable message                   203.325
channel context: 18464876448             channel handle: 18534680736              broadcast message: 17601834312

01-OCT-12 01.11.24.541 AM    2       1309 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.436
type|mode: 1230372869                    id1: 1398361667                          id2: 23

01-OCT-12 01.11.24.541 AM    2       1368 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   reliable message                   204.392
channel context: 18464876448             channel handle: 18534681536              broadcast message: 17638615688

01-OCT-12 01.11.24.541 AM    2       1369 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.719
type|mode: 1230372869                    id1: 1280262987                          id2: 14

01-OCT-12 01.11.24.541 AM    2       1371 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    106.093
type|mode: 1230372869                    id1: 1398361667                          id2: 48

01-OCT-12 01.11.24.541 AM    2       1372 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.045
type|mode: 1230372869                    id1: 1280262987                          id2: 52

01-OCT-12 01.11.24.541 AM    2       1431 oracle@racnode1.us.oracle.com (LGWR)         log file parallel write               .331
files: 2                                 blocks: 4                                requests: 2

01-OCT-12 01.11.24.541 AM    2       1436 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   reliable message                   202.088
channel context: 18464876448             channel handle: 18534682336              broadcast message: 17601842440

01-OCT-12 01.11.24.541 AM    2       1437 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    106.166
type|mode: 1230372869                    id1: 1280262987                          id2: 44

01-OCT-12 01.11.24.541 AM    2       1439 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.365

SAMPLE_TIME               INST SESSION_ID PROGRAM                                       EVENT                          TIME_WAITED
------------------------- ---- ---------- --------------------------------------------- ------------------------------ -----------
P1                                       P2                                       P3
---------------------------------------- ---------------------------------------- ----------------------------------------
type|mode: 1230372869                    id1: 1398361667                          id2: 24

01-OCT-12 01.11.24.541 AM    2       1502 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   DFS lock handle                    105.389
type|mode: 1230372869                    id1: 1280262987                          id2: 16

01-OCT-12 01.11.55.591 AM    2       1496 oracle@racnode1.us.oracle.com (CKPT)         control file parallel write         13.751
files: 2                                 block#: 4                                requests: 2

01-OCT-12 01.11.58.591 AM    2       1496 oracle@racnode1.us.oracle.com (CKPT)         control file parallel write         38.408
files: 2                                 block#: 4                                requests: 2

02-OCT-12 06.00.10.897 AM    2       1239 oracle@racnode1.us.oracle.com (M000)         log file sync                        4.308
buffer#: 35003                           sync scn: 3426312105                     : 0

02-OCT-12 06.00.10.897 AM    2       1431 oracle@racnode1.us.oracle.com (LGWR)         log file parallel write              4.088
files: 2                                 blocks: 2458                             requests: 2

02-OCT-12 06.00.26.917 AM    2        588 oracle@racnode1.us.oracle.com (DW00)         Datapump dump file I/O               3.380
count: 1                                 intr: 256                                timeout: 4294967295

02-OCT-12 06.00.49.947 AM    2       1496 oracle@racnode1.us.oracle.com (CKPT)         control file parallel write          8.079
files: 2                                 block#: 4                                requests: 2

09-OCT-12 12.43.30.714 AM    2        652 sqlplus@racnode1.us.oracle.com (TNS V1-V3)   log file sync                      999.805
buffer#: 122391                          sync scn: 3431114291                     : 0

09-OCT-12 12.43.30.714 AM    2       1431 oracle@racnode1.us.oracle.com (LGWR)         log file parallel write           1000.738
files: 2                                 blocks: 4                                requests: 2

09-OCT-12 12.43.52.633 AM    1        293 oracle@dmorldb05.us.oracle.com (M001)         CSS operation: action                4.057
function_id: 65                          : 0                                      : 0


TIME
-----------------------
Oct10 13:07:22



References

NOTE:34592.1 - WAITEVENT: "log file sync" Reference Note
NOTE:857576.1 - How to Reduce Waits on 'Log File Sync'

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