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  • 开启 oracle 的闪回功能

    查看是否开启闪回

    SQL> select flashback_on from v$database;
    
    FLASHBACK_ON
    ------------------
    NO
    

    查看是否配置了db_recover_file_dest

    SQL> show parameter db_recovery
    
    NAME				     TYPE	 VALUE
    ------------------------------------ ----------- ------------------------------
    db_recovery_file_dest		     string
    db_recovery_file_dest_size	     big integer 0
    

    没有配置的话,先创建对应的目录,注意目录的权限和oracle数据库的一致

    mkdir /u01/flashback
    chown oracle:oinstall /u01/flashback
    
    SQL> alter system set db_recovery_file_dest_size=30G scope=both;
    SQL> alter system set db_recovery_file_dest='/u01/flashback'  scope=both;
    
    System altered.
    

    关闭 oracle

    SQL> shutdown immediate;
    Database closed.
    Database dismounted.
    ORACLE instance shut down.
    

    启动到 mount 状态

    SQL> startup mount;
    ORACLE instance started.
    
    Total System Global Area 1603411968 bytes
    Fixed Size		    2253664 bytes
    Variable Size		  905972896 bytes
    Database Buffers	  687865856 bytes
    Redo Buffers		    7319552 bytes
    Database mounted.
    

    开启 archeve log

    SQL> alter database archivelog;
    
    Database altered.
    

    开启闪回功能

    SQL> alter database flashback on;
    
    Database altered.
    

    启动数据库到 open 状态

    SQL> alter database open;
    
    Database altered.
    
    SQL> select flashback_on from v$database;
    
    FLASHBACK_ON
    ------------------
    YES
    
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  • 原文地址:https://www.cnblogs.com/xingyys/p/11387335.html
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