时间：2021-07-01 10:21:17 帮助过：2人阅读
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.
更改Oracle 10g/11g数据库为归档模式
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