為什么80%的碼農都做不了架構師？>>>

1.確認當前模式

SYS AS SYSDBA on 29-MAR-05 >select flashback_on from v$database;

FLA

---

NO

2.檢查/修改恢復區設置

SYS AS SYSDBA on 29-MAR-05 >show parameter db_recovery_file_dest

NAME TYPE VALUE

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

db_recovery_file_dest string /data5/flash_recovery_area

db_recovery_file_dest_size big integer 10G

3.檢查/修改閃回時間設置

SYS AS SYSDBA on 29-MAR-05 >show parameter db_flashback_retention_target

NAME TYPE VALUE

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

db_flashback_retention_target integer 60

SYS AS SYSDBA on 29-MAR-05 >alter system set db_flashback_retention_target=1440;

System altered.

4.重新啟動數據庫到Mount狀態

啟動flashback database選項。

SYS AS SYSDBA on 29-MAR-05 >shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

SYS AS SYSDBA on 29-MAR-05 >startup mount;

ORACLE instance started.

Total System Global Area 314572800 bytes

Fixed Size 1301704 bytes

Variable Size 261890872 bytes

Database Buffers 50331648 bytes

Redo Buffers 1048576 bytes

Database mounted.

SYS AS SYSDBA on 29-MAR-05 >alter database flashback on;

Database altered.

SYS AS SYSDBA on 29-MAR-05 >alter database open;

Database altered.

總結

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