释放oracle undo表空间,undo表空间释放

一.概述:

使用IMPDP工具导入大表(166G)数据时,报undo表空间不能扩展,导入工作失败.手工停止了impdp后,undo表空间存在无法自动释放的故障.本文主要描述如何通过重建undo表空间来手工释放undo表空间.

数据库环境的描述:

OS: AIX 6.1+HACMP 5.3

DB: ORACLE 10.2.0.5 RAC

二.问题的描述

impdp 导入数据时,报ora-30036错误

$impdp user/passwd directory=imp_dir dumpfile=big_table_%U.dmp parallel=10 logfile=imp_big_table.log

ORA-30036: unable to extend segment by 8 in undo tablespace 'UNDOTBS1'[@more@]

检查数据库的归档日志文件,也发现了这个报警

more /oracle/admin/*/bdump/alert_{SID}.log|grep undo

ORA-30036: unable to extend segment by 8 in undo tablespace 'UNDOTBS1'

ORA-30036: unable to extend segment by 8 in undo tablespace 'UNDOTBS1'

ORA-30036: unable to extend segment by 8 in undo tablespace 'UNDOTBS1'

强行终止了impdp的操作,impdp的进程在操作中已不见

# ps -ef|grep impdp

root 8650752 8061396 0 15:02:08 pts/1 0:0