Hi, You can query the v$session_wait (or event 10046 if you are a big fan of 10046) to get the latch#. If I Remeber right the P2 value in the session wait (or p3?) gives the latch number and you can join this with v$latch_name to get the name of the latch. Once you find out the waiting (or spinning) latch you can get an easy fix based on the latch.
Regards, K Gopalakrishnan ----- Original Message ----- To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> Sent: Friday, September 05, 2003 5:14 AM > The number of waits is irrelevant. What matters is the time waited which in > your case shows 0, but I assume that is because you have not set > timed_statistics to true. Without that the data from v$system_event are > worthless. Cary will probably step in here and tell you that even with > timed_statistics that data is at best of dubious worth. > > At 02:49 PM 9/4/2003 -0800, you wrote: > > > System-wide Wait Analysis > > for current wait events > > > > Average > >Event Total Seconds Total Wait > >Name Waits Waiting Timeouts (in secs) > >------------- --------- --------- --------- > >----------- > >latch free 1,459 0 1,393 .000 > > > >After querying v$system_event my biggest concern is the "latch free" wait > >event. I understand that latch free is "the process waits for a latch that > >is currently busy ( held by another process). How can I drill down and > >find the cause of this? I have a feeling it is about rollback or redo > >logs. > > > >thanks, > > > > > > > >David Ehresmann > > > >-- > >Please see the official ORACLE-L FAQ: http://www.orafaq.net > >-- > >Author: Ehresmann, David > > INET: [EMAIL PROTECTED] > > > >Fat City Network Services -- 858-538-5051 http://www.fatcity.com > >San Diego, California -- Mailing list and web hosting services > >--------------------------------------------------------------------- > >To REMOVE yourself from this mailing list, send an E-Mail message > >to: [EMAIL PROTECTED] (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). > > Wolfgang Breitling > Oracle7, 8, 8i, 9i OCP DBA > Centrex Consulting Corporation > http://www.centrexcc.com > > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: Wolfgang Breitling > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 http://www.fatcity.com > San Diego, California -- Mailing list and web hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an E-Mail message > to: [EMAIL PROTECTED] (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). -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: K Gopalakrishnan INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (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).
