【筆記】ash

ash

select * from v$sgastat where name like '%ASH%';

select x.ksppinm name, y.ksppstvl value, x.ksppdesc describ
  from x$ksppi x, x$ksppcv y
 where x.inst_id = userenv('Instance')
   and y.inst_id = userenv('Instance')
   and x.indx = y.indx
   and x.ksppinm like '%&par%';
  
select * from v$active_session_history;

SELECT     dbid,
           instance_number,
           MIN (snap_id) begin_snap_id,
           MAX (snap_id) end_snap_id
    FROM   dba_hist_snapshot
   WHERE   end_interval_time >= SYSDATE - 7
GROUP BY   dbid, instance_number;

SELECT output FROM table (DBMS_WORKLOAD_REPOSITORY.awr_report_text (959453279, 1, 2, 10, 0));

 

 

SQL> @?/rdbms/admin/ashrpt.sql

Current Instance
~~~~~~~~~~~~~~~~
   DB Id    DB Name     Inst Num Instance
----------- ------------ -------- ------------
  959453279 TEST10G             1 test10g

Specify the Report Type
~~~~~~~~~~~~~~~~~~~~~~~
Enter 'html' for an HTML report, or 'text' for plain text
Defaults to 'html'
輸入 report_type 的值:
Type Specified:  html

Instances in this Workload Repository schema
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   DB Id     Inst Num DB Name     Instance     Host
------------ -------- ------------ ------------ ------------
* 959453279         1 TEST10G      test10g      ICBCOA-6170D
                                                1DD

Defaults to current database
Using database id: 959453279

Defaults to current instance
Using instance number: 1

ASH Samples in this Workload Repository schema
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Oldest ASH sample available:  29-1月 -10 23:36:47  [   2088 mins in the past]
Latest ASH sample available:  31-1月 -10 10:24:43  [      0 mins in the past]

Specify the timeframe. to generate the ASH report
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Enter begin time for report:

--    Valid input formats:
--      To specify absolute begin time:
--        [MM/DD[/YY]] HH24:MI[:SS]
--        Examples: 02/23/03 14:30:15
--                  02/23 14:30:15
--                  14:30:15
--                  14:30
--      To specify relative begin time: (start with '-' sign)
--        -[HH24:]MI
--        Examples: -1:15  (SYSDATE - 1 Hr 15 Mins)
--                  -25    (SYSDATE - 25 Mins)

Defaults to -15 mins
輸入 begin_time 的值:  -5
Report begin time specified: -5

Enter duration in minutes starting from begin time:
Defaults to SYSDATE - begin_time
Press Enter to analyze till current time
輸入 duration 的值:
Report duration specified:
Using 31-1月 -10 10:19:47 as report begin time
Using 31-1月 -10 10:24:49 as report end time

Specify Slot Width (using ashrpti.sql) for 'Activity Over Time' section
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

-- Explanation:
--   In the 'Activity Over Time' section of the ASH report,
--   the analysis period is divided into smaller slots
--   and top wait events are reported in each of those slots.

-- Default:
--   The analysis period will be automatically split upto 10 slots
--   complying to a minimum slot width of
--     1 minute,  if the source is V$ACTIVE_SESSION_HISTORY or
--     5 minutes, if the source is DBA_HIST_ACTIVE_SESS_HISTORY.

Specify Slot Width in seconds to use in the 'Activity Over Time' section:
Defaults to a value as explained above:
Slot Width specified:

Specify Report Targets (using ashrpti.sql) to generate the ASH report
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

-- Explanation:
--   ASH Report can accept "Report Targets",
--   like a particular SQL statement, or a particular SESSION,
--   to generate the report on. If one or more report targets are
--   specified, then the data used to generate the report will only be
--   the ASH samples that pertain to ALL the specified report targets.

-- Default:
--   If none of the report targets are specified,
--   then the target defaults to all activity in the database instance.

Specify SESSION_ID (eg: from V$SESSION.SID) report target:
Defaults to NULL:
SESSION report target specified:

Specify SQL_ID (eg: from V$SQL.SQL_ID) report target:
Defaults to NULL: (% and _ wildcards allowed)
SQL report target specified:

Specify WATI_CLASS name (eg: from V$EVENT_NAME.WAIT_CLASS) report target:
[Enter 'CPU' to investigate CPU usage]
Defaults to NULL: (% and _ wildcards allowed)
WAIT_CLASS report target specified:

Specify SERVICE_HASH (eg: from V$ACTIVE_SERVICES.NAME_HASH) report target:
Defaults to NULL:
SERVICE report target specified:

Specify MODULE name (eg: from V$SESSION.MODULE) report target:
Defaults to NULL: (% and _ wildcards allowed)
MODULE report target specified:

Specify ACTION name (eg: from V$SESSION.ACTION) report target:
Defaults to NULL: (% and _ wildcards allowed)
ACTION report target specified:

Specify CLIENT_ID (eg: from V$SESSION.CLIENT_IDENTIFIER) report target:
Defaults to NULL: (% and _ wildcards allowed)
CLIENT_ID report target specified:

Specify the Report Name
~~~~~~~~~~~~~~~~~~~~~~~
The default report file name is ashrpt_1_0131_1024.html.  To use this name,
press to continue, otherwise enter an alternative.
輸入 report_name 的值:  E:\oracle\a.html
Using the report name E:\oracle\a.html
Summary of All User Input
-------------------------
Format         : HTML
DB Id          : 959453279
Inst num       : 1
Begin time     : 31-1月 -10 10:19:47
End time       : 31-1月 -10 10:24:49
Slot width     : Default
Report targets : 0
Report name    : E:\oracle\a.html
....

 

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