RE: archived log switch - detecting whos causing excessive redo generation

From: Michael Dinh <mdinh_at_XIFIN.Com>
Date: Sat, 18 Jun 2011 09:26:35 -0700
Message-ID: <D29F9902E534D5478F2E83FD6A44B3063B038A7A6D_at_mail02.mba.xifin.com>



Even though the problem has been resolved, I am still researching for methods to better identify and came across this.

Oracle Troubleshooting with Snapper detecting whos causing excessive redo generation

http://blog.tanelpoder.com/2008/05/30/oracle-troubleshooting-with-snapper-detecting-whos-causing-excessive-redo-generation/



From: oracle-l-bounce_at_freelists.org [oracle-l-bounce_at_freelists.org] On Behalf Of Tim Gorman [tim_at_evdbt.com] Sent: Friday, June 17, 2011 3:59 PM
To: oracle-l_at_freelists.org
Subject: Re: archived log switch

Michael,

The only session-level redo information is the real-time information in V$SESSTAT; I don't think there is anything usable in AWR. Query V$SESSTAT (via a join from V$STATNAME for the statistic name via the column STATISTIC#) for a statistic like "redo size" in order to identify a session (or sessions) generating a lot of redo, the join back to V$SESSION and figure out to whom that session (or those sessions) belongs, what it is executing, etc.

Good luck!

Tim Gorman

consultant -> Evergreen Database Technologies, Inc.
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Lost Data? => http://www.ora600.be/ for info about DUDE...


On 6/17/2011 4:27 PM, Michael Dinh wrote: All of a sudden, we are experiencing 10x the number of archived logs switch

Does anyone have ideas on how to identify what is causing so many archived logs?

Thanks.

Michael Dinh

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http://www.freelists.org/webpage/oracle-l Received on Sat Jun 18 2011 - 11:26:35 CDT

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