教你如何重建Oracle数据库的回滚段

1、将数据关闭

svrmgrl >Shutdown abort

2、修改初始化参数文件

$ vi $ORACLE_HOME/dbs/init< sid >.ora

添加以下参数

rollback_segments=(system)

_corrupted_rollback_segments=(r01,r02,r03,r04)

_allow_resetlogs_corruption=ture

3、重新装载数据库

svrmgrl >Startup mount

4、从数据库的控制文件中将回滚段表空间rbs的数据文件离线并去掉。

svrmgrl >alter database datafile

‘##/##/rbs01.dbf’ offline drop;

---- 对数据库进行恢复。

svrmgrl >recover database using backup controlfile;

---- 此时屏幕上可能会出现：

ORA_00280 Change #### for thread# is in sequence#

specify log:[< RET > for suggested|AUTO|from logsource|cancel]

输入 cancel(不要输入其他命令)

svrmgrl >alter database open resetlogs;

5、 重建新的回滚段

---- 将旧回滚段及回滚表空间删除。

svrmgrl >alter rollback_segment r01 offline drop;

svrmgrl >alter rollback_segment r02 offline drop;

svrmgrl >alter rollback_segment r03 offline drop;

svrmgrl >alter rollback_segment r04 offline drop;

svrmgrl >drop tablespace rbs including contents;

---- 重建新的回滚表空间及回滚段。

svrmgrl >connect internal

svrmgrl >create rollback segment ro tablespace system;

svrmgrl >alter rollback segment ro online;

svrmgrl >create tablespace rbs datafile

##/##/rbs01.dbf’ size ##k;

svrmgrl >create rollback segment r01 tablespace rbs;

svrmgrl >create rollback segment r02 tablespace rbs;

svrmgrl >create rollback segment r03 tablespace rbs;

svrmgrl >create rollback segment r04 tablespace rbs;

svrmgrl >alter rollback segment r01 online;

svrmgrl >alter rollback segment r02 online;

svrmgrl >alter rollback segment r03 online;

svrmgrl >alter rollback segment r04 online;

svrmgrl >Shutdown abort

$ vi $ORACLE_HOME/dbs/init< sid >.ora

rollback_segments=(r01,r02,r03,r04)

将参数_corrupted_rollback_segment

_allow_resetlogs_corruption=true去掉

svrmgrl >Startup normal

(T114)