RE: UL - contention Wait Event

Hi Dean,  

UL is a user lock...you're doing it to yourself. ;-)  

Look for code in your application that uses DBMS_LOCK calls. The DBMS_LOCK API is an interface to allow users and applications manage locking through the same enqueue/lock mechanisms that Oracle uses internally. But, every lock created/managed by DBMS_LOCK will be of type 'UL'.  

Hope that helps,  

-Mark  

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Mark J. Bobak
Senior Database Administrator, System & Product Technologies ProQuest
789 E. Eisenhower, Parkway, P.O. Box 1346 Ann Arbor MI 48106-1346
734.997.4059 or 800.521.0600 x 4059
mark.bobak_at_il.proquest.com <mailto:mark.bobak_at_il.proquest.com> www.proquest.com <http://www.proquest.com/> www.csa.com <http://www.csa.com/>

ProQuest...Start here.  

From: oracle-l-bounce_at_freelists.org
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Dean Richards Sent: Monday, June 11, 2007 12:31 PM
To: oracle-l_at_freelists.org
Subject: enq: UL - contention Wait Event

Does anyone know what the wait event named "enq: UL - contention" means? There is nothing in Metalink or anywhere that I can find that gives the definition. I have a session that waits more than 90% of its time on this event.  

Thanks.      

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http://www.freelists.org/webpage/oracle-l Received on Mon Jun 11 2007 - 12:23:19 CDT