rollback segment

From: AK <oramagic_at_hotmail.com>
Date: Fri, 14 Mar 2003 13:53:42 -0800
Message-ID: <F001.0056AD59.20030314135342@fatcity.com>

I have recently found that one temporary rollback segment in system tablespace is having more then 600 extnets . It looks like previous dba created this rollback segment at the time of db creation and forgot to take it offline . Now how do I find it this rollback segment is being used actively . I see values in gets , writes from v$rollstat view .

What step should I take to drop this rollback segment . What implication might have if I take this offline ? I want to relase the space taken by this rollback segment ( >600 extents ..thats big ) , so just taking offline wont do this.

Are there any views accessible from system( no sys) account which can tell me which trasaction is using which rollback segment .

thanks
-ak

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Author: AK
  INET: oramagic_at_hotmail.com

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