oracle 的归档模式的 开启与关闭
DB version：11.2.0.3.0
OS version：rhel 6.3
PS：测试用的数据库是一个刚刚模拟断电的库
- 打开归档模式
已sysdba身份登录数据库
[oracle@oracle ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.3.0 Production on Mon Apr 29 16:02:20 2024
Copyright (c) 1982, 2011, Oracle. All rights reserved.
Connected to an idle instance.
SQL> startup mount;
ORACLE instance started.
Total System Global Area 626327552 bytes
Fixed Size 2230952 bytes
Variable Size 373294424 bytes
Database Buffers 247463936 bytes
Redo Buffers 3338240 bytes
Database mounted.
当前状态为非归档模式
SQL> archive log list;
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 5
Current log sequence 7
开启归档模式
SQL> alter database archivelog;
alter database archivelog
*
ERROR at line 1:
ORA-00265: instance recovery required, cannot set ARCHIVELOG mode
哦？神奇的一幕出现了。。。数据库的非正常关闭的，需要recovery。。当前状态无法打开归档模式
SQL> alter database open;
Database altered.
后台日志如下
332 alter database open
333 Beginning crash recovery of 1 threads
334 Started redo scan
335 Completed redo scan
336 read 6 KB redo, 4 data blocks need recovery
337 Started redo application at
338 Thread 1: logseq 7, block 58339
339 Recovery of Online Redo Log: Thread 1 Group 1 Seq 7 Reading mem 0
340 Mem# 0: /u01/app/oracle/oradata/ORCL/redo01a.log
341 Completed redo application of 0.00MB
342 Completed crash recovery at
343 Thread 1: logseq 7, block 58351, scn 225781
344 4 data blocks read, 4 data blocks written, 6 redo k-bytes read
345 Mon Apr 29 16:03:30 2024
346 Thread 1 advanced to log sequence 8 (thread open)
347 Thread 1 opened at log sequence 8
348 Current log# 2 seq# 8 mem# 0: /u01/app/oracle/oradata/ORCL/redo02a.log
349 Successful open of redo thread 1
350 MTTR advisory is disabled because FAST_START_MTTR_TARGET is not set
351 Mon Apr 29 16:03:30 2024
352 SMON: enabling cache recovery
353 [2743] Successfully onlined Undo Tablespace 2.
354 Undo initialization finished serial:0 start:404654 end:404714 diff:60 (0 seconds)
355 Verifying file header compatibility for 11g tablespace encryption..
356 Verifying 11g file header compatibility for tablespace encryption completed
357 SMON: enabling tx recovery
358 Database Characterset is AL32UTF8
359 No Resource Manager plan active
360 replication_dependency_tracking turned off (no async multimaster replication found)
361 Starting background process QMNC
362 Mon Apr 29 16:03:31 2024
363 QMNC started with pid=20, OS id=2746
364 Completed: alter database open
数据库启动后，正常关闭数据库
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount;
ORACLE instance started.
Total System Global Area 626327552 bytes
Fixed Size 2230952 bytes
Variable Size 373294424 bytes
Database Buffers 247463936 bytes
Redo Buffers 3338240 bytes
Database mounted.
SQL> archive log list;
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 6
Current log sequence 8
启动到mount状态后，打开归档成功
SQL> alter database archivelog;
Database altered.
SQL> alter database open;
Database altered.
SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 6
Next log sequence to archive 8
Current log sequence 8
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
- 关闭归档模式
SQL> startup mount;
ORACLE instance started.
Total System Global Area 626327552 bytes
Fixed Size 2230952 bytes
Variable Size 373294424 bytes
Database Buffers 247463936 bytes
Redo Buffers 3338240 bytes
Database mounted.
启动到mount状态后，关闭归档模式
SQL> alter database noarchivelog;
Database altered.
SQL> archive log list;
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 6
Current log sequence 8
SQL> alter database open;
Database altered.
