Oracle 10g里启动自动归档模式

时间:2022-06-17 14:49:56

检查归档模式命令:

SQL> archive log list
Database log mode No Archive Mode
Automatic archival Disabled
Archive destination USE_DB_RECOVERY_FILE_DEST
Oldest online log sequence 15
Current log sequence 17

设置归档模式:

SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup mount
ORACLE instance started.

Total System Global Area 1258291200 bytes
Fixed Size 1219160 bytes
Variable Size 318768552 bytes
Database Buffers 922746880 bytes
Redo Buffers 15556608 bytes
Database mounted.

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 15
Next log sequence to archive 17
Current log sequence 17

如果需要停止归档模式,使用:alter database noarchivelog 命令。Oracle10g之前,你还需要修改初始化参数使数据库处于自动归档模式。在pfile/spfile中设置如下参数:

log_archive_start = true

重启数据库此参数生效,此时数据库处于自动归档模式。也可以在数据库启动过程中,手工执行:

archive log start

使数据库启用自动归档,但是重启后数据库仍然处于手工归档模式。10g使用db_recovery_file_dest来作为归档日志的存放地。

SQL> show parameter db_recovery

NAME TYPE VALUE
db_recovery_file_dest string /home/oracle/ora10g/flash_reco
very_area/
db_recovery_file_dest_size big integer 20G

可以修改db_recovery_file_dest_size参数的大小

alter system set db_recovery_file_dest_size=21474836480