oracle 设置归档与非归档模式

－，查看oracle归档模式

SQL> conn evan/evan (dba)

Connected.

SQL> archive log list

ORA-01031: insufficient privileges

SQL> conn / as sysdba --archive log list需要以sysdba执行

Connected.

SQL> archive log list

Database log mode No Archive Mode

Automatic archival Disabled

Archive destination USE_DB_RECOVERY_FILE_DEST

Oldest online log sequence 2

Current log sequence 4

查询v$database

SQL> select name,log_mode from v$database;



NAME LOG_MODE

--------- ------------

ORALIFE NOARCHIVELOG

二，修改归档模式

归档日志位置,Oracle 10g可以生成多份一样的日志，保存多个位置，以防不测

SQL> alter system set log_archive_dest_1='location=/oracle/10g/oracle/log/archive_log';

System altered.

SQL> alter system set log_archive_dest_2='location=/oracle/10g/oracle/log/archive_log2';

System altered.

SQL> shutdown immediate

ORA-01031: insufficient privileges

SQL> conn / as sysdba

Connected.

SQL> shutdown immediate

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> startup mount

ORACLE instance started.

Total System Global Area 528482304 bytes

Fixed Size 1220360 bytes

Variable Size 163578104 bytes

Database Buffers 356515840 bytes

Redo Buffers 7168000 bytes

Database mounted.

SQL> alter database archivelog; －－设置归档模式

Database altered.

SQL> alter database open;

Database altered.

配置归档文件格式(从oracle 10g 开始，必须带有%s,%t,%r)

SQL> alter system set log_archive_format="archive_%t_%s_%r.arclog" scope=spfile;

System altered.

SQL> shutdown immediate

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> startup mount

ORACLE instance started.

Total System Global Area 528482304 bytes

Fixed Size 1220360 bytes

Variable Size 163578104 bytes

Database Buffers 356515840 bytes

Redo Buffers 7168000 bytes

Database mounted.

SQL> archive log list －－查看是否归档

Database log mode Archive Mode

Automatic archival Enabled －－已开启自动归档

Archive destination /oracle/10g/oracle/log/archive_log2

Oldest online log sequence 2

Next log sequence to archive 4

Current log sequence 4

SQL> select destination from v$archive_dest; －－查看归档日志位置

DESTINATION

--------------------------------------------------------------------------------

/oracle/10g/oracle/log/archive_log

/oracle/10g/oracle/log/archive_log2

10 rows selected.

还可以配置归档进程个数

alter system set log_archive_max_processes=n

三，修改为非归档模式

SQL> startup mount

ORACLE instance started.

Total System Global Area 528482304 bytes

Fixed Size 1220360 bytes

Variable Size 167772408 bytes

Database Buffers 352321536 bytes

Redo Buffers 7168000 bytes

Database mounted.

SQL> alter database noarchivelog;

Database altered.

SQL> alter system set log_archive_dest_1='';

System altered.

SQL> alter system set log_archive_dest_2='';

System altered.

SQL> alter system set log_archive_dest_10='location=USE_DB_RECOVERY_FILE_DEST'; －－恢复为原来

System 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> shutdown immediate

ORA-01109: database not open

Database dismounted.

ORACLE instance shut down.

SQL> startup mount

ORACLE instance started.

Total System Global Area 528482304 bytes

Fixed Size 1220360 bytes

Variable Size 167772408 bytes

Database Buffers 352321536 bytes

Redo Buffers 7168000 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
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