Oracle FAQ Your Portal to the Oracle Knowledge Grid

Home -> Community -> Mailing Lists -> Oracle-L -> RE: Suggestions Needed: Latch free - library cache

RE: Suggestions Needed: Latch free - library cache

From: Bobak, Mark <>
Date: Wed, 07 Jan 2004 14:59:26 -0800
Message-ID: <>


What Oracle version?  If you're not patched up to the latest patchset for your release, it's always a good idea to do so, as library cache bugs seem to invariably appear in every release.
Has your code changed recently?  Has your usage increased recently?
Finally, library cache latch contention can be a sign of excessive soft parsing (hard parsing usually causes more shared pool latch contention).  Do you have session_cached_cursors set?
Just some thoughts....

Mark J. Bobak
Oracle DBA
ProQuest Company
Ann Arbor, MI
"Imagination was given to man to compensate him for what he is not, and a sense of humor was provided to console him for what he is."  --Unknown

-----Original Message-----
From: Tracy Rahmlow []
Sent: Wednesday, January 07, 2004 5:40 PM
To: Multiple recipients of list ORACLE-L
Subject: Suggestions Needed: Latch free - library cache

We have experienced intermittent problems (slow response time) with our oltp database today.  There appears to be a large number of latch free events and the p2 parameter is indicating an issue with the library cache.  Any thoughts on where to go next?

American Express made the following
annotations on 01/07/2004 03:36:25 PM

"This message and any attachments are solely for the intended recipient and may contain confidential or privileged information. If you are not the intended recipient, any disclosure, copying, use, or distribution of the information included in this message and any attachments is prohibited. If you have received this communication in error, please notify us by reply e-mail and immediately and permanently delete this message and any attachments. Thank you."



Please see the official ORACLE-L FAQ:
Author: Bobak, Mark

Fat City Network Services    -- 858-538-5051
San Diego, California        -- Mailing list and web hosting services
To REMOVE yourself from this mailing list, send an E-Mail message
to: (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).

Received on Wed Jan 07 2004 - 16:59:26 CST

Original text of this message