一、oracle 10g/11g
在Oracle 11g,开启archive log模式时,默认归档目录为db_recovery_file_dest指定。此参数在pfile/spfile中可以指定:
db_recovery_file_dest=‘/u01/app/oracle/flash_recovery_area‘;
1.sqlplus / as sysdba;登陆进去;
2、关闭数据库
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.
3、启动数据mount状态:
SQL> startup mount;
ORACLE instance started.
Total System Global Area 285212672 bytes
Fixed Size 1218992 bytes
Variable Size 92276304 bytes
Database Buffers 188743680 bytes
Redo Buffers 2973696 bytes
Database mounted.
4、修改数据库为归档模式:
SQL> alter database archivelog;(非归档模式为noarchivelog)
Database altered.
5、打开数据库,查询:
SQL> alter database open;
Database altered.
SQL> archive log list
Database log mode Archive Mode
Automatic archival Enabled
Archive destination /oracle/oracle10g/log/archive_log
Oldest online log sequence 0
Next log sequence to archive 1
Current log sequence 1
5、修改日志文件命名格式:
SQL> alter system set log_archive_max_processes = 5;
SQL> alter system set log_archive_format = "archive_%t_%s_%r.log" scope=spfile;
System altered.