【dg】lgwr sync最大性能到最大可用的切换脚本、测试日志记录
2024-07-02 07:32:29
一、切换脚本
1：主库执行alter database set standby database to maximize availability;
//之后备库应用完归档日志后也自动变成maximize availability，主库宕机后备库还是maximize availability状态
2：主库执行shutdown immediate并startup
3：备库执行alter database recover managed standby database cancel;
4：备库创建standby redo log
先在主库查询有多少组redo log，有N组redo log就建立N+1组standby log，redo log多大，standby log也建立多大
alter database add standby logfile
group 4 '/u01/app/oracle/oradata/orcl/standby_redo04.log' size 50M,
group 5 '/u01/app/oracle/oradata/orcl/standby_redo05.log' size 50M,
group 6 '/u01/app/oracle/oradata/orcl/standby_redo06.log' size 50M,
group 7 '/u01/app/oracle/oradata/orcl/standby_redo07.log' size 50M;
5：备库执行alter database recover managed standby database disconnect from session;（再应用主库重启时产生的归档日志，主库那刻产生的归档日志可能因为主库重启或备库执行alter database recover managed standby database cancel没有应用到）
6：备库执行alter database recover managed standby database cancel;
7：备库执行alter database recover managed standby database using current logfile disconnect from session;
二、切换日志
primary
SQL> select OPEN_MODE,DB_UNIQUE_NAME,PROTECTION_MODE,SWITCHOVER_STATUS from v$database;OPEN_MODE DB_UNIQUE_NAME PROTECTION_MODE SWITCHOVER_STATUS
-------------------- ------------------------------ -------------------- --------------------
READ WRITE orcl MAXIMUM PERFORMANCE TO STANDBYSQL> alter database set standby database to maximize availability; Database altered.SQL> select OPEN_MODE,DB_UNIQUE_NAME,PROTECTION_MODE,SWITCHOVER_STATUS from v$database;OPEN_MODE DB_UNIQUE_NAME PROTECTION_MODE SWITCHOVER_STATUS
-------------------- ------------------------------ -------------------- --------------------
READ WRITE orcl MAXIMUM AVAILABILITY FAILED DESTINATIONSQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup
ORACLE instance started.Total System Global Area 209235968 bytes
Fixed Size 1335528 bytes
Variable Size 180358936 bytes
Database Buffers 20971520 bytes
Redo Buffers 6569984 bytes
Database mounted.
Database opened.
SQL> select OPEN_MODE,DB_UNIQUE_NAME,PROTECTION_MODE,SWITCHOVER_STATUS from v$database;OPEN_MODE DB_UNIQUE_NAME PROTECTION_MODE SWITCHOVER_STATUS
-------------------- ------------------------------ -------------------- --------------------
READ WRITE orcl MAXIMUM AVAILABILITY FAILED DESTINATIONSQL> /OPEN_MODE DB_UNIQUE_NAME PROTECTION_MODE SWITCHOVER_STATUS
-------------------- ------------------------------ -------------------- --------------------
READ WRITE orcl MAXIMUM AVAILABILITY FAILED DESTINATIONSQL> /OPEN_MODE DB_UNIQUE_NAME PROTECTION_MODE SWITCHOVER_STATUS
-------------------- ------------------------------ -------------------- --------------------
READ WRITE orcl MAXIMUM AVAILABILITY FAILED DESTINATIONSQL> select OPEN_MODE,DB_UNIQUE_NAME,PROTECTION_MODE,SWITCHOVER_STATUS from v$database;OPEN_MODE DB_UNIQUE_NAME PROTECTION_MODE SWITCHOVER_STATUS
-------------------- ------------------------------ -------------------- --------------------
READ WRITE orcl MAXIMUM AVAILABILITY FAILED DESTINATIONstandby
SQL> select OPEN_MODE,DB_UNIQUE_NAME,PROTECTION_MODE,SWITCHOVER_STATUS from v$database;OPEN_MODE DB_UNIQUE_NAME PROTECTION_MODE SWITCHOVER_STATUS
-------------------- ------------------------------ -------------------- --------------------
READ ONLY WITH APPLY ora10g MAXIMUM PERFORMANCE NOT ALLOWEDSQL> alter database recover managed standby database cancel;Database altered.SQL> alter database add standby logfile 2 group 4 '/u01/app/oracle/oradata/orcl/standby_redo04.log' size 50M,3 group 5 '/u01/app/oracle/oradata/orcl/standby_redo05.log' size 50M,4 group 6 '/u01/app/oracle/oradata/orcl/standby_redo06.log' size 50M,5 group 7 '/u01/app/oracle/oradata/orcl/standby_redo07.log' size 50M;Database altered.SQL> alter database recover managed standby database disconnect from session;Database altered.SQL> alter database recover managed standby database cancel;Database altered.SQL> alter database recover managed standby database using current logfile disconnect from session;Database altered.SQL> select OPEN_MODE,DB_UNIQUE_NAME,PROTECTION_MODE,SWITCHOVER_STATUS from v$database;OPEN_MODE DB_UNIQUE_NAME PROTECTION_MODE SWITCHOVER_STATUS
-------------------- ------------------------------ -------------------- --------------------
READ ONLY WITH APPLY ora10g MAXIMUM AVAILABILITY NOT ALLOWED
三、切换测试
primary
SQL> insert into scott.emp (EMPNO, ENAME, JOB, MGR, HIREDATE, SAL, COMM, DEPTNO)2 values ('9991', 'SMITH', 'CLERK', '7902', to_date('17-12-1980', 'dd-mm-yyyy'), '800', null, '20');1 row created.SQL> select count(*) From scott.emp;COUNT(*)
----------21SQL> commit;SQL> select process,status,pid,client_process,client_pid,group#,sequence#,block#2 from v$managed_standby;PROCESS STATUS PID CLIENT_P CLIENT_PID GROUP# SEQUENCE# BLOCK#
--------- ------------ ---------- -------- ---------- ---------- ---------- ----------
ARCH CLOSING 19054 ARCH 19054 N/A 92 1
ARCH CLOSING 19056 ARCH 19056 2 92 1
ARCH CONNECTED 19058 ARCH 19058 N/A 0 0
ARCH CLOSING 19060 ARCH 19060 3 93 1
LGWR WRITING 19028 LGWR 19028 1 94 393SQL>
SQL> select process,status,pid,client_process,client_pid,group#,sequence#,block#2 from v$managed_standby;PROCESS STATUS PID CLIENT_P CLIENT_PID GROUP# SEQUENCE# BLOCK#
--------- ------------ ---------- -------- ---------- ---------- ---------- ----------
ARCH CLOSING 19054 ARCH 19054 N/A 92 1
ARCH CLOSING 19056 ARCH 19056 2 92 1
ARCH CONNECTED 19058 ARCH 19058 N/A 0 0
ARCH CLOSING 19060 ARCH 19060 3 93 1
LGWR WRITING 19028 LGWR 19028 1 94 419SQL> select process,status,pid,client_process,client_pid,group#,sequence#,block#2 from v$managed_standby;PROCESS STATUS PID CLIENT_P CLIENT_PID GROUP# SEQUENCE# BLOCK#
--------- ------------ ---------- -------- ---------- ---------- ---------- ----------
ARCH CLOSING 19054 ARCH 19054 N/A 92 1
ARCH CLOSING 19056 ARCH 19056 2 92 1
ARCH CONNECTED 19058 ARCH 19058 N/A 0 0
ARCH CLOSING 19060 ARCH 19060 3 93 1
LGWR WRITING 19028 LGWR 19028 1 94 422standby
SQL> select count(*) From scott.emp;COUNT(*)
----------20SQL> /COUNT(*)
----------21SQL> select process,status,pid,client_process,client_pid,group#,sequence#,block#2 from v$managed_standby;PROCESS STATUS PID CLIENT_P CLIENT_PID GROUP# SEQUENCE# BLOCK#
--------- ------------ ---------- -------- ---------- ---------- ---------- ----------
ARCH CONNECTED 13249 ARCH 13249 N/A 0 0
ARCH CONNECTED 13252 ARCH 13252 N/A 0 0
ARCH CLOSING 13254 ARCH 13254 5 92 1
ARCH CLOSING 13256 ARCH 13256 4 93 1
MRP0 APPLYING_LOG 28070 N/A N/A N/A 94 391
RFS IDLE 28111 N/A 19058 N/A 0 0
RFS IDLE 28113 UNKNOWN 19060 N/A 0 0
RFS IDLE 28115 LGWR 19028 1 94 391
RFS IDLE 28117 UNKNOWN 19054 N/A 0 09 rows selected.SQL> select process,status,pid,client_process,client_pid,group#,sequence#,block#2 from v$managed_standby;PROCESS STATUS PID CLIENT_P CLIENT_PID GROUP# SEQUENCE# BLOCK#
--------- ------------ ---------- -------- ---------- ---------- ---------- ----------
ARCH CONNECTED 13249 ARCH 13249 N/A 0 0
ARCH CONNECTED 13252 ARCH 13252 N/A 0 0
ARCH CLOSING 13254 ARCH 13254 5 92 1
ARCH CLOSING 13256 ARCH 13256 4 93 1
MRP0 APPLYING_LOG 28070 N/A N/A N/A 94 430
RFS IDLE 28111 N/A 19058 N/A 0 0
RFS IDLE 28113 UNKNOWN 19060 N/A 0 0
RFS IDLE 28115 LGWR 19028 1 94 430
RFS IDLE 28117 UNKNOWN 19054 N/A 0 09 rows selected.SQL> select * from v$standby_log;GROUP# DBID THREAD# SEQUENCE# BYTES BLOCKSIZE USED ARC STATUS FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME LAST_CHANGE# LAST_TIME
---------- ---------------------------------------- ---------- ---------- ---------- ---------- ---------- --- ---------- ------------- --------- ------------ --------- ------------ ---------
########## 1282391501 1 94 52428800 512 231936 YES ACTIVE 1665815 25-JUN-19 1666222 25-JUN-19 1666222 25-JUN-19
########## UNASSIGNED 1 0 52428800 512 512 NO UNASSIGNED 0 0 0
########## UNASSIGNED 0 0 52428800 512 512 YES UNASSIGNED 0 0 0
########## UNASSIGNED 0 0 52428800 512 512 YES UNASSIGNED 0 0 0SQL> /GROUP# DBID THREAD# SEQUENCE# BYTES BLOCKSIZE USED ARC STATUS FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME LAST_CHANGE# LAST_TIME
---------- ---------------------------------------- ---------- ---------- ---------- ---------- ---------- --- ---------- ------------- --------- ------------ --------- ------------ ---------
########## 1282391501 1 94 52428800 512 241152 YES ACTIVE 1665815 25-JUN-19 1666245 25-JUN-19 1666245 25-JUN-19
########## UNASSIGNED 1 0 52428800 512 512 NO UNASSIGNED 0 0 0
########## UNASSIGNED 0 0 52428800 512 512 YES UNASSIGNED 0 0 0
########## UNASSIGNED 0 0 52428800 512 512 YES UNASSIGNED 0 0 0SQL> /GROUP# DBID THREAD# SEQUENCE# BYTES BLOCKSIZE USED ARC STATUS FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME LAST_CHANGE# LAST_TIME
---------- ---------------------------------------- ---------- ---------- ---------- ---------- ---------- --- ---------- ------------- --------- ------------ --------- ------------ ---------
########## 1282391501 1 94 52428800 512 241664 YES ACTIVE 1665815 25-JUN-19 1666245 25-JUN-19 1666245 25-JUN-19
########## UNASSIGNED 1 0 52428800 512 512 NO UNASSIGNED 0 0 0
########## UNASSIGNED 0 0 52428800 512 512 YES UNASSIGNED 0 0 0
########## UNASSIGNED 0 0 52428800 512 512 YES UNASSIGNED 0 0 0SQL> /GROUP# DBID THREAD# SEQUENCE# BYTES BLOCKSIZE USED ARC STATUS FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME LAST_CHANGE# LAST_TIME
---------- ---------------------------------------- ---------- ---------- ---------- ---------- ---------- --- ---------- ------------- --------- ------------ --------- ------------ ---------
########## 1282391501 1 94 52428800 512 242176 YES ACTIVE 1665815 25-JUN-19 1666245 25-JUN-19 1666245 25-JUN-19
########## UNASSIGNED 1 0 52428800 512 512 NO UNASSIGNED 0 0 0
########## UNASSIGNED 0 0 52428800 512 512 YES UNASSIGNED 0 0 0
########## UNASSIGNED 0 0 52428800 512 512 YES UNASSIGNED 0 0 0SQL> /GROUP# DBID THREAD# SEQUENCE# BYTES BLOCKSIZE USED ARC STATUS FIRST_CHANGE# FIRST_TIM NEXT_CHANGE# NEXT_TIME LAST_CHANGE# LAST_TIME
---------- ---------------------------------------- ---------- ---------- ---------- ---------- ---------- --- ---------- ------------- --------- ------------ --------- ------------ ---------
########## 1282391501 1 94 52428800 512 242688 YES ACTIVE 1665815 25-JUN-19 1666245 25-JUN-19 1666245 25-JUN-19
########## UNASSIGNED 1 0 52428800 512 512 NO UNASSIGNED 0 0 0
########## UNASSIGNED 0 0 52428800 512 512 YES UNASSIGNED 0 0 0
########## UNASSIGNED 0 0 52428800 512 512 YES UNASSIGNED 0 0 0【dg】lgwr sync最大性能到最大可用的切换脚本、测试日志记录相关推荐
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