在alert日志中发现ORA-01595/ORA-01594错误

Sat May 12 21:54:17 2012
Errors in file /oracle/app/admin/prmdb/bdump/prmdb2_smon_483522.trc:
ORA-01595: error freeing extent (2) of rollback segment (19))
ORA-01594: attempt to wrap into rollback segment (19) extent (2) which is being freed

分析trace文件

Oracle9i Enterprise Edition Release 9.2.0.8.0 - 64bit Production
With the Partitioning, Real Application Clusters, OLAP and Oracle Data Mining options
JServer Release 9.2.0.8.0 - Production
ORACLE_HOME = /oracle/app/product/9.2.0
System name:    AIX
Node name:      prmsvr2
Release:        3
Version:        5
Machine:        0008585FD600
Instance name: prmdb2
Redo thread mounted by this instance: 2
Oracle process number: 14
Unix process pid: 483522, image: oracle@prmsvr2 (SMON)
*** 2011-05-03 15:28:47.858
*** SESSION ID:(17.1) 2011-05-03 15:28:47.843
*** 2011-05-03 15:28:47.858
SMON: Parallel transaction recovery tried
*** 2011-07-11 17:13:52.028
SMON: Restarting fast_start parallel rollback
*** 2011-07-11 17:28:39.705
SMON: Parallel transaction recovery tried
*** 2012-05-12 21:54:17.246   --当前问题时间点
SMON: following errors trapped and ignored:
ORA-01595: error freeing extent (2) of rollback segment (19))
ORA-01594: attempt to wrap into rollback segment (19) extent (2) which is being freed
--通过trace文件,我们没有获得关于该错误的其他有用信息

查询MOS相关信息[280151.1]
出现该错误原因

This is a known problem and there is an Internal Bug:2181139 for this Issue.
The error is signaled because smon is shrinking a rollback segment and this fails
because we need an extent to store some rollback information. This is a failure message
for the shrinking. Subsequently smon would succeed in doing that.
--当smon在shrink rollback segment因为需要一个extent存放rollback

解决建议

Ignore these error messages.
Normally adding more undo space should solve the problem,
but if space is not correcting the problem, please file an SR for assistance.
This error message logging is fixed in 10g.
--忽略该错误或者升级到10g