Paul , try joining the v$session with v$sqlarea to find offending sql harassing the cache buffers chains..
here is a sample sql u could use .. select sql_text from v$sqlarea, v$session where v$sqlarea.address= v$session.sql_address and v$sqlarea.hash_value = v$session.sql_hash_value and sid='Your Sid From V$session wait for latch#66'; find the offending sql and tune it .. cache buffer chains latch means that your SQL is badly written and is performing a considerably higher # of LIO's .. explian plan the sql and see if you can use indexes .. also analyze your table and indexes .. post dump from v$session wait for wait=0 (waiting state) .. so other list members an give you more suggestions Deepak --- "Gogala, Mladen" <[EMAIL PROTECTED]> wrote: > Try v$latch_children > > -----Original Message----- > Sent: Monday, November 12, 2001 2:30 PM > To: Multiple recipients of list ORACLE-L > > > I have a puzzling problem: a session is apparently > waiting on a "cache > buffers chains latch" forever (well, for 40 minutes > and counting, so > far); seq# in v$session_wait is static. "tries" is > 0. > > latch free > > address > > C000000004708BC0 > number > > 66 > tries > 0 > 00 > When examining the latch in question (using the > address from > v$session_wait.p1raw), I'm not seeing any change in > the get, misses, > etc. statistics. It's as though a process has the > latch and won't let > go. Any ideas from the list as to where I look > next? > > TIA, > > Paul Baumgartel > > > __________________________________________________ > Do You Yahoo!? > Find a job, post your resume. > http://careers.yahoo.com > -- > Please see the official ORACLE-L FAQ: > http://www.orafaq.com > -- > Author: Paul Baumgartel > INET: [EMAIL PROTECTED] > > Fat City Network Services -- (858) 538-5051 FAX: > (858) 538-5051 > San Diego, California -- Public Internet > access / Mailing Lists > -------------------------------------------------------------------- > 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.com > -- > Author: Gogala, Mladen > INET: [EMAIL PROTECTED] > > Fat City Network Services -- (858) 538-5051 FAX: > (858) 538-5051 > San Diego, California -- Public Internet > access / Mailing Lists > -------------------------------------------------------------------- > 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). __________________________________________________ Do You Yahoo!? Find a job, post your resume. http://careers.yahoo.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Deepak Thapliyal INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- 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).
