UNDOTBS很大的处理

undotbs 由oracle管理,用于事务回滚 kill执行的进程可释放? 

--重建释放空间法 (待整理)
--1.create undo tablespace....
--2.check
select usn,xacts,status,rssize/1024/1024/1024,hwmsize/1024/1024/1024,shrinks 
from v$rollstat order by USN; 
--3.更新
alter system set undo_tablespace=undotbs2 scope=both; 
--4.check
select usn,xacts,status,rssize/1024/1024/1024,hwmsize/1024/1024/1024,shrinks 
from v$rollstat order by USN; 
--5.delete
drop tablespace undotbs1 including contents and datafiles; 

http://www.pubbs.net/201001/oracle/41703-how-to-clear-undotbs.html
How to clear UNDOTBS

http://blog.chinaunix.net/u2/61277/showart_711541.html