[20160813]12c開啟附加日誌問題.txt

lfree發表於2016-08-15

[20160813]12c開啟附加日誌問題.txt

--測試需要要在12c下開啟附加日誌,遇到一些問題,做1個記錄:

1.環境:
SCOTT@test01p> @ ver1
PORT_STRING                    VERSION        BANNER                                                                               CON_ID
------------------------------ -------------- -------------------------------------------------------------------------------- ----------
IBMPC/WIN_NT64-9.1.0           12.1.0.1.0     Oracle Database 12c Enterprise Edition Release 12.1.0.1.0 - 64bit Production              0

--我的測試環境有pdb資料庫的.
SYS@test> select * from CDB_PDBS;
    PDB_ID PDB_NAME                   DBID    CON_UID GUID                             STATUS        CREATION_SCN     CON_ID
---------- -------------------- ---------- ---------- -------------------------------- ------------- ------------ ----------
         3 TEST01P              1652643119 1652643119 A1EEB4B6462C40349D6EE072862CABA8 NORMAL             2454021          1
         2 PDB$SEED             4063864810 4063864810 E328565B49E148BDBA65856218380E9D NORMAL             2256383          1

2.我開始沒有注意,在PDB=test01p下執行操作:

SCOTT@test01p> show con_name
CON_NAME
--------
TEST01P

SCOTT@test01p> alter database add supplemental log data;
Database altered.
--發現居然也可以.

SCOTT@test01p> select SUPPLEMENTAL_LOG_DATA_MIN,SUPPLEMENTAL_LOG_DATA_PK, SUPPLEMENTAL_LOG_DATA_UI from v$database;
SUPPLEME SUP SUP
-------- --- ---
YES      NO  NO

SYS@test> show con_name
CON_NAME
---------
CDB$ROOT

SYS@test> select SUPPLEMENTAL_LOG_DATA_MIN,SUPPLEMENTAL_LOG_DATA_PK, SUPPLEMENTAL_LOG_DATA_UI from v$database;
SUPPLEME SUP SUP
-------- --- ---
YES      NO  NO

--可以很好理解都是修改控制檔案.如果在pdb取消附加日誌:

SCOTT@test01p> alter database drop supplemental log data;
Database altered.

--//test01p
SCOTT@test01p> select SUPPLEMENTAL_LOG_DATA_MIN,SUPPLEMENTAL_LOG_DATA_PK, SUPPLEMENTAL_LOG_DATA_UI from v$database;
SUPPLEME SUP SUP
-------- --- ---
YES      NO  NO

--//CDB$ROOT
SYS@test> select SUPPLEMENTAL_LOG_DATA_MIN,SUPPLEMENTAL_LOG_DATA_PK, SUPPLEMENTAL_LOG_DATA_UI from v$database;
SUPPLEME SUP SUP
-------- --- ---
YES      NO  NO

--可以發現在pdb資料庫下無法取消附加日誌.

--//CDB$ROOT
SYS@test> alter database drop supplemental log data;
Database altered.

SYS@test> select SUPPLEMENTAL_LOG_DATA_MIN,SUPPLEMENTAL_LOG_DATA_PK, SUPPLEMENTAL_LOG_DATA_UI from v$database;
SUPPLEME SUP SUP
-------- --- ---
NO       NO  NO

--//test01p
SCOTT@test01p> select SUPPLEMENTAL_LOG_DATA_MIN,SUPPLEMENTAL_LOG_DATA_PK, SUPPLEMENTAL_LOG_DATA_UI from v$database;
SUPPLEME SUP SUP
-------- --- ---
NO       NO  NO

--可以發現在pdb下可以開啟附加日誌,這樣應該全部pdb我覺得應該都會開啟.但是要取消,僅僅在CDB$ROOT下操作才有效.

3.繼續測試:
--順便建立1張表插入資料.不提交.

--session 1:
SCOTT@test01p> insert into t1(a) values (1);
1 row created.

--切換到另外使用者執行;
SCOTT@test01p(243,27)> alter database add supplemental log data;
--可以發現會話掛起.

SYS@test> @ wait
P1RAW            P2RAW            P3RAW                    P1         P2         P3        SID    SERIAL#       SEQ# EVENT                                    STATE               WAIT_TIME_MICRO SECONDS_IN_WAIT
---------------- ---------------- ---------------- ---------- ---------- ---------- ---------- ---------- ---------- ---------------------------------------- ------------------- --------------- ---------------
0000000042455100 0000000000000001 00               1111838976          1          0        131        337        539 SQL*Net message to client                WAITED SHORT TIME                 9               0
0000000054580004 0000000000050018 0000000000006053 1415053316     327704      24659        243         27        768 enq: TX - contention                     WAITING                    33832130              34

--可以發現1個等待事件是enq: TX - contention

--session 1:
SCOTT@test01p> @ s
SCOTT@test01p(10,1671)> @ spid
       SID    SERIAL# SPID       PID  P_SERIAL# C50
---------- ---------- ------ ------- ---------- --------------------------------------------------
        10       1671 5720        56         61 alter system kill session '10,1671' immediate;

SYS@test> @ viewlock
   SID    SERIAL# USERNAME   OSUSER     MACHINE    MODULE       LOCK_TYPE       MODE_HELD  MODE_REQUE LOCK_ID1   LOCK_ID2   OWNER  OBJECT_TYP OBJECT_NAME          BLOCK LOCKWAIT
------ ---------- ---------- ---------- ---------- ------------ --------------- ---------- ---------- ---------- ---------- ------ ---------- -------------------- ----- --------------------
    10       1671 SCOTT      XXX\Admini WORKGROUP\ SQL*Plus     TM DML(TM)      Row-X (SX) None       105275     0                                                 No
                             strator    XXX

    10       1671 SCOTT      XXX\Admini WORKGROUP\ SQL*Plus     TX Transaction  Exclusive  None       327704     24659                                             Yes
                             strator    XXX

   243         27 SCOTT      XXX\Admini WORKGROUP\ SQL*Plus     TX Transaction  None       Share      327704     24659                                             No    000007FF6161B848
                             strator    XXX
--//沒有在pdb下執行, OWNER  OBJECT_TYP OBJECT_NAME沒有顯示.

SYS@test> @xid
XIDUSN_XIDSLOT_XIDSQN
------------------------------


    XIDUSN    XIDSLOT     XIDSQN     UBAFIL     UBABLK     UBASQN     UBAREC STATUS            USED_UBLK  USED_UREC XID              ADDR             START_DATE          C70
---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------------- ---------- ---------- ---------------- ---------------- ------------------- ----------------------------------------------------------------------
         5         24      24659          5       2486       1487         26 ACTIVE                    1          1 0500180053600000 000007FF5E9E8778 2016-08-13 22:43:26 ALTER SYSTEM DUMP UNDO BLOCK '_SYSSMU5_2367258232$' XID 5 24 24659;
                                                                                                                                                                          ALTER SYSTEM DUMP UNDO HEADER '_SYSSMU5_2367258232$';
                                                                                                                                                                          ALTER SYSTEM DUMP DATAFILE 5 BLOCK 2486;
select 327704,trunc(327704/65536) XIDUSN,mod(327704,65536)  XIDSLOT from dual
    327704     XIDUSN    XIDSLOT
---------- ---------- ----------
    327704          5         24

--//這些XIDUSN,XIDSLOT,XIDSQN=5,24,24659都與LOCK_ID1,LOCK_ID2對上.說明開啟附加日誌需要等待事務結束.
SCOTT@test01p(10,1671)> commit ;
Commit complete.

--session 2執行ok.

4.繼續測試:
SYS@test> alter database drop supplemental log data;
Database altered.

--session 1:再次插入資料,不提交:
SCOTT@test01p(10,1671)> insert into t1(a) values (2);
1 row created.

--//CDB$ROOT
SYS@test> alter database add supplemental log data;
Database altered.

--居然ok了.pdb下有事務,不影響cdb執行開啟附加日誌的功能!!

--//CDB$ROOT
SYS@test> select SUPPLEMENTAL_LOG_DATA_MIN,SUPPLEMENTAL_LOG_DATA_PK, SUPPLEMENTAL_LOG_DATA_UI from v$database;
SUPPLEME SUP SUP
-------- --- ---
YES      NO  NO

--//test01p
SCOTT@test01p(243,27)> select SUPPLEMENTAL_LOG_DATA_MIN,SUPPLEMENTAL_LOG_DATA_PK, SUPPLEMENTAL_LOG_DATA_UI from v$database;
SUPPLEME SUP SUP
-------- --- ---
YES      NO  NO

5.繼續測試:
SYS@test> create table t2 (id number);
Table created.

SYS@test> alter database drop supplemental log data;
Database altered.

--//CDB$ROOT
SYS@test> select SUPPLEMENTAL_LOG_DATA_MIN,SUPPLEMENTAL_LOG_DATA_PK, SUPPLEMENTAL_LOG_DATA_UI from v$database;
SUPPLEME SUP SUP
-------- --- ---
NO       NO  NO

--//test01p
SCOTT@test01p(243,27)> select SUPPLEMENTAL_LOG_DATA_MIN,SUPPLEMENTAL_LOG_DATA_PK, SUPPLEMENTAL_LOG_DATA_UI from v$database;
SUPPLEME SUP SUP
-------- --- ---
NO       NO  NO


--session 1:
SYS@test> insert into t2 values (1);
1 row created.

--session 2:
SYS@test> alter database add supplemental log data;

--再次掛起.
--session 1:
SYS@test> @s
SYS@test(131,337)> @spid
   SID    SERIAL# SPID       PID  P_SERIAL# C50
------ ---------- ------ ------- ---------- --------------------------------------------------
   131        337 7844        53         67 alter system kill session '131,337' immediate;

SYS@test(131,337)> @wait
P1RAW            P2RAW            P3RAW                    P1         P2         P3    SID    SERIAL#       SEQ# EVENT                                    STATE               WAIT_TIME_MICRO SECONDS_IN_WAIT
---------------- ---------------- ---------------- ---------- ---------- ---------- ------ ---------- ---------- ---------------------------------------- ------------------- --------------- ---------------
0000000042455100 0000000000000001 00               1111838976          1          0    131        337        709 SQL*Net message to client                WAITED SHORT TIME                12               0
0000000054580004 00000000000E000F 00000000000008D7 1415053316     917519       2263     10       1673         37 enq: TX - contention                     WAITING                   100081106             100

SYS@test(131,337)> @viewlock
   SID    SERIAL# USERNAME   OSUSER     MACHINE    MODULE       LOCK_TYPE       MODE_HELD  MODE_REQUE LOCK_ID1   LOCK_ID2   OWNER  OBJECT_TYP OBJECT_NAME          BLOCK LOCKWAIT
------ ---------- ---------- ---------- ---------- ------------ --------------- ---------- ---------- ---------- ---------- ------ ---------- -------------------- ----- --------------------
    10       1673 SYS        XXX\Admini WORKGROUP\ sqlplus.exe  TX Transaction  None       Share      917519     2263                                              No    000007FF6161B2D8
                             strator    XXX

   131        337 SYS        XXX\Admini WORKGROUP\ sqlplus.exe  TX Transaction  Exclusive  None       917519     2263                                              Yes
                             strator    XXX

   131        337 SYS        XXX\Admini WORKGROUP\ sqlplus.exe  TM DML(TM)      Row-X (SX) None       100875     0          SYS    TABLE      T2                   No
                             strator    XXX

SYS@test(131,337)> @xid
XIDUSN_XIDSLOT_XIDSQN
------------------------------
14.15.2263

    XIDUSN    XIDSLOT     XIDSQN     UBAFIL     UBABLK     UBASQN     UBAREC STATUS            USED_UBLK  USED_UREC XID              ADDR             START_DATE          C70
---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------------- ---------- ---------- ---------------- ---------------- ------------------- ----------------------------------------------------------------------
        14         15       2263          5       1183        762          4 ACTIVE                    1          1 0E000F00D7080000 000007FF5E981528 2016-08-13 23:03:02 ALTER SYSTEM DUMP UNDO BLOCK '_SYSSMU14_843651722$' XID 14 15 2263;
                                                                                                                                                                          ALTER SYSTEM DUMP UNDO HEADER '_SYSSMU14_843651722$';
                                                                                                                                                                          ALTER SYSTEM DUMP DATAFILE 5 BLOCK 1183;
select 917519,trunc(917519/65536) XIDUSN,mod(917519,65536)  XIDSLOT from dual
    917519     XIDUSN    XIDSLOT
---------- ---------- ----------
    917519         14         15

--說明在有事務下,執行開啟附加日誌必須等事務提交才ok.我有空給在11g下測試看看,存在事務沒提交的情況下,是否開啟附加日誌會阻塞.

--補充11g下linux的測試:
SYS@book> @ &r/ver1

PORT_STRING                    VERSION        BANNER
------------------------------ -------------- --------------------------------------------------------------------------------
x86_64/Linux 2.4.xx            11.2.0.4.0     Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production

SYS@book> select SUPPLEMENTAL_LOG_DATA_MIN,SUPPLEMENTAL_LOG_DATA_PK, SUPPLEMENTAL_LOG_DATA_UI from v$database;
SUPPLEME SUP SUP
-------- --- ---
NO       NO  NO

--開啟session 1,建立表,插入資料,不提交:
SCOTT@book> create table t2 (id number);
Table created.

SCOTT@book> insert into t2 values (1);
1 row created.

SCOTT@book> @ &r/s
SCOTT@book(101,7171)>

SCOTT@book(101,7171)> @ &r/xid
XIDUSN_XIDSLOT_XIDSQN
------------------------------
10.23.57204

    XIDUSN    XIDSLOT     XIDSQN     UBAFIL     UBABLK     UBASQN     UBAREC STATUS            USED_UBLK  USED_UREC XID              ADDR             START_DATE          C70
---------- ---------- ---------- ---------- ---------- ---------- ---------- ---------------- ---------- ---------- ---------------- ---------------- ------------------- ----------------------------------------------------------------------
        10         23      57204          3       1761      11682          6 ACTIVE                    1          1 0A00170074DF0000 0000000081932FD0 2016-08-15 08:42:10 ALTER SYSTEM DUMP UNDO BLOCK '_SYSSMU10_1197734989$' XID 10 23 57204;
                                                                                                                                                                          ALTER SYSTEM DUMP UNDO HEADER '_SYSSMU10_1197734989$';
                                                                                                                                                                          ALTER SYSTEM DUMP DATAFILE 3 BLOCK 1761;
--session 2:
SYS@book> alter database add supplemental log data;
--掛起!

--session 1:
SCOTT@book(101,7171)> @ &r/viewlock
   SID    SERIAL# USERNAME   OSUSER     MACHINE    MODULE       LOCK_TYPE       MODE_HELD  MODE_REQUE LOCK_ID1   LOCK_ID2   OWNER  OBJECT_TYP OBJECT_NAME          BLOCK LOCKWAIT
------ ---------- ---------- ---------- ---------- ------------ --------------- ---------- ---------- ---------- ---------- ------ ---------- -------------------- ----- --------------------
    90       5421 SYS        oracle     gxqyydg4   sqlplus@gxqy TX Transaction  None       Share      655383     57204                                             No    00000000851E3C88
                                                   ydg4 (TNS V1
                                                   -V3)

   101       7171 SCOTT      oracle     gxqyydg4   SQL*Plus     TX Transaction  Exclusive  None       655383     57204                                             Yes
   101       7171 SCOTT      oracle     gxqyydg4   SQL*Plus     TM DML(TM)      Row-X (SX) None       96016      0          SCOTT  TABLE      T2                   No

 


SYS@book> alter database add supplemental log data;
alter database add supplemental log data
*
ERROR at line 1:
ORA-01013: user requested cancel of current operation


SYS@book> select SUPPLEMENTAL_LOG_DATA_MIN,SUPPLEMENTAL_LOG_DATA_PK, SUPPLEMENTAL_LOG_DATA_UI from v$database;
SUPPLEME SUP SUP
-------- --- ---
YES      NO  NO

--中斷,你可以查詢發現SUPPLEMENTAL_LOG_DATA_MIN=yes.再次執行1次,估計已經開啟,不會有任何操作。

SYS@book> alter database add supplemental log data;
Database altered.

SYS@book> alter database drop supplemental log data;
--掛起!在有事務的情況下也會掛起。

SYS@book> select SUPPLEMENTAL_LOG_DATA_MIN,SUPPLEMENTAL_LOG_DATA_PK, SUPPLEMENTAL_LOG_DATA_UI from v$database;
SUPPLEME SUP SUP
-------- --- ---
NO       NO  NO

--檢查發現居然也取消了。
--我12c 使用的windows版本,無法中斷。按ctrl+c就退出。

--檢查alert*.log如下:
Mon Aug 15 08:43:39 2016
alter database add supplemental log data
SUPLOG: Previous supplemental logging attributes at scn = 13245951124
SUPLOG:  minimal = OFF, primary key = OFF
SUPLOG:  unique = OFF, foreign key = OFF, all column = OFF
SUPLOG:  procedural replication = OFF
SUPLOG: New supplemental logging attributes at scn = 13245951124
SUPLOG:  minimal = ON, primary key = OFF
SUPLOG:  unique = OFF, foreign key = OFF, all column = OFF
SUPLOG:  procedural replication = OFF
Mon Aug 15 08:43:43 2016
Incremental checkpoint up to RBA [0x1bd.5d30.0], current log tail at RBA [0x1bd.5e03.0]
Mon Aug 15 08:46:00 2016
ORA-1013 signalled during: alter database add supplemental log data...
Mon Aug 15 08:46:53 2016
alter database add supplemental log data
Completed: alter database add supplemental log data
Mon Aug 15 08:47:42 2016
alter database drop supplemental log data
SUPLOG: Previous supplemental logging attributes at scn = 13245951518
SUPLOG:  minimal = ON, primary key = OFF
SUPLOG:  unique = OFF, foreign key = OFF, all column = OFF
SUPLOG:  procedural replication = OFF
SUPLOG: New supplemental logging attributes at scn = 13245951518
SUPLOG:  minimal = OFF, primary key = OFF
SUPLOG:  unique = OFF, foreign key = OFF, all column = OFF
SUPLOG:  procedural replication = OFF
Mon Aug 15 08:48:13 2016
ORA-1013 signalled during: alter database drop supplemental log data...

--總結:
1.我不知道按ctrl+c,是否真正成功。
2.在11g下有事務的情況下無法開啟與關閉附件日誌,按ctrl+c中斷,查詢v$database提示操作成功,是否真有效。
3.12c 下pdb開啟附加日誌,全域性有效。而有事務存在的情況也會掛起。
4.但是存在1個例外(12c),就是pdb下有事務,cdb一樣可以正常開啟附加日誌。

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