ORA-01153: an incompatible media recovery is active Cause: Attempted to start an incompatible media recovery or open resetlogs during media recovery or RMAN backup . Media recovery sessions are incompatible if they attempt to recover the same data fi…

实例的恢复( crash recovery) 什么时候发生Oracle实例恢复? shutdown abort; 数据库异常down掉(机器死机,掉电...) 实例恢复的原因是数据有丢掉,使用redo数据恢复 实例恢复是一个自动的过程,不需要人工干预. 控制文件就是为了检查一致性,如果不一致就会实例恢复 实例恢复发生在那个阶段? sql>startup nomount(读取spfle) ,启动实例,oracle给自己分了一些内存,oracle的内存起来,这个时候没有实例恢复. SQL> sta…

oracle12c data guard,从库无法应用日志,检查alert日至发现 2019-10-21T14:55:40.087819+08:00 MRP0: Background Media Recovery process shutdown (DATA) 查看mrp的trace发现: Trace file /oracle/diag/rdbms/pdDATA/DATA/trace/DATA_mrp0_37206.trc Oracle Database 12c Enterprise Editi…

由于规范存储位置以及存储空间调整缘故需要移动表空间MRP_INDEX2的数据文件,如下所示,首先将表空间MRP_INDEX2脱机; 然后复制数据文件:接着重命名数据文件,最后将表空间MRP_INDEX2联机. 在操作过后,最后一步将表空间MRP_INDEX2联机上线时,出现了意外错误信息,如下所示: SQL> ALTER TABLESPACE MRP_INDEX2 OFFLINE NORMAL;   Tablespace altered.   SQL> !cp /u03/flash_recov…

http://neeraj-dba.blogspot.com/2011/10/ora-10456-cannot-open-standby-database.html   Once while starting my standby database i found that database is not opening in normal mode. It throws the error-10456 :cannot standby database.  On performing some…

SQL> select * from v$version; Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production   数据库启动到MOUNT状态: SQL> alter database noarchivelog; alter database noarchivelog * ERROR at line 1: ORA-38774: cannot disable media recovery - f…

Basic Concepts of Block Media Recovery Whenever block corruption has been automatically detected, you can perform block media recovery manually with the RECOVER ... BLOCK command. By default, RMAN first searches for good blocks in the real-time query…

在物理DG主备库切换时遇到ORA-16139: media recovery required错误 SQL> ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY; ALTER DATABASE COMMIT TO SWITCHOVER TO PRIMARY * ERROR at line 1: ORA-16139: media recovery required 解决办法: --如果报ORA-16139: media recovery required,…

APPLIES TO: Oracle Database - Enterprise Edition - Version 9.2.0.1 to 12.1.0.2 [Release 9.2 to 12.1]Information in this document applies to any platform.***Checked for relevance on 26-Sep-2012*** ***Checked for relevance on 8-Jul-2015*** SYMPTOMS Add…

块介质恢复性能增强(block media recovery) :只是恢复受损的块.不需要将受损的数据文件offline.针对受损的数据块,使用备份中好的数据块进行restore和recover,避免了对整个数据文件的restore和recover. 前提条件:必须开启闪回数据库功能. 在oracle 10g中,blockrecover命令可以执行块介质恢复.在oracle 11g中,新的命令recover ... block代替了blockrecover.recover ... block会在…