Oracle中的ORA-01548: active rollback segment ‘_SYSSMU1$‘ found
接上文《Oracle Undo tablespace恢复（无备份）》
http://tiany.blog.51cto.com/513694/1431287
1、在创建新的undo tablesapce “undotbs2”后，删除旧的undo tablespace
15:12:49 [email protected] prod>ALTER tablespace undotbs1 offline immediate;
Tablespace altered.
Elapsed: 00:00:00.15
报以下错误：
15:12:59 [email protected] prod>drop tablespace undotbs1 including contents and datafiles;
drop tablespace undotbs1 including contents and datafiles
*
ERROR at line 1:
ORA-01548: active rollback segment ‘_SYSSMU1_3780397527$‘ found, terminate dropping tablespace
Elapsed: 00:00:00.05
2、通过spfile生成pfile
15:13:08 [email protected] prod>create pfile from spfile;
File created.
Elapsed: 00:00:00.11
15:14:12 [email protected] prod>shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
在initprod.ora 文件加入以下隐含参数：
_offline_rollback_segments=(_SYSSMU10_3550978943$,_SYSSMU9_1424341975$,_SYSSMU8_2012382730$,_SYSSMU7_3286610060$,_SYSSMU6_2443381498$,_SYSSMU5_1527469038$,_SYSSMU4_1152005954$,_SYSSMU3_2097677531$,_SYSSMU2_2232571081$,_SYSSMU1_3780397527$)
3、重新启动database，并删除旧的undo tablespace
[[email protected] dbs]$ sqlplus ‘/as sysdba‘
SQL*Plus: Release 11.2.0.1.0 Production on Thu Jun 26 16:32:49 2014
Copyright (c) 1982, 2009, Oracle. All rights reserved.
Connected to an idle instance.
16:32:49 [email protected] prod>create spfile from pfile;
File created.
Elapsed: 00:00:00.04
16:32:52 [email protected] prod>startup
ORACLE instance started.
Total System Global Area 835104768 bytes
Fixed Size 2217952 bytes
Variable Size 775948320 bytes
Database Buffers 54525952 bytes
Redo Buffers 2412544 bytes
Database mounted.
Database opened.
16:33:06 [email protected] prod>drop tablespace undotbs1 including contents and datafiles;
Tablespace dropped.
Elapsed: 00:00:00.59
16:33:17 [email protected] prod>shutdown immediate；
在pfile 删除_offline_rollback_segments参数；
16:33:56 [email protected] prod>create spfile from pfile;
File created.
Elapsed: 00:00:00.05
16:33:59 [email protected] prod>startup
ORACLE instance started.
Total System Global Area 835104768 bytes
Fixed Size 2217952 bytes
Variable Size 775948320 bytes
Database Buffers 54525952 bytes
Redo Buffers 2412544 bytes
Database mounted.
Database opened.
16:34:17 [email protected] prod>select count(*) from scott.emp;
COUNT(*)
----------
14
Elapsed: 00:00:00.05
16:34:20 [email protected] prod>select tablespace_name,status from dba_tablespaces;
TABLESPACE_NAME STATUS
------------------------------ ---------
SYSTEM ONLINE
SYSAUX ONLINE
TEMP ONLINE
USERS ONLINE
UNDOTBS2 ONLINE
EXAMPLE ONLINE
TBS1 ONLINE
7 rows selected.
Elapsed: 00:00:00.06
16:34:28 [email protected] prod>
@至此，undo tablespace 被正常删除！
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Oracle中的ORA-01548: active rollback segment '_SYSSMU1$' found