用户准备清除dg,单机运行,但我清除主库的dg相关参数后,启动数据库报:

ORA-03113

SQL> startup;

ORACLE instance started.

Total System Global Area 2147483648 bytes

Fixed Size 1220460 bytes

Variable Size 452984980 bytes

Database Buffers 1677721600 bytes

Redo Buffers 15556608 bytes

Database mounted.

ORA-03113: end-of-file on communication channel

检查alert.log日志错误信息:

Thu Aug 13 09:21:15 2009

LGWR: Primary database is in MAXIMUM AVAILABILITY mode

LGWR: Destination LOG_ARCHIVE_DEST_1 is not serviced by LGWR

LGWR: Minimum of 1 synchronous standby database required

Thu Aug 13 09:21:15 2009

Errors in file /u01/app/oracle/admin/esuite/bdump/esuite_lgwr_3948.trc:

ORA-16072: Message 16072 not found; No message file for product=RDBMS, facility=ORA

Thu Aug 13 09:21:15 2009

Errors in file /u01/app/oracle/admin/esuite/bdump/esuite_lgwr_3948.trc:

ORA-16072: Message 16072 not found; No message file for product=RDBMS, facility=ORA

LGWR: terminating instance due to error 16072

Instance terminated by LGWR, pid = 3948

原因是最大性能模式(最大保护模式也一样)要求备库是可通信的, 而原先只是把备库干掉了, 但没有把保护模式

做更改, 所以主库重启会有错误. 现在只要在打开数据库前把改为最大性能模式即可.

SQL> startup mount;

ORACLE instance started.

Total System Global Area 2147483648 bytes

Fixed Size 1220460 bytes

Variable Size 452984980 bytes

Database Buffers 1677721600 bytes

Redo Buffers 15556608 bytes

Database mounted.

SQL> alter database set standby database to maximize performance;

Database altered.

SQL> alter database open;

Database altered.

SQL>