Please see the link... Steve Adams has given lots of information on it..... http://www.ixora.com.au/
Yes you have contention problem and that may be causing high CPU Utilizxation..... It is not simple to analyse redo copy contention problem and soln with below data... detail investigation, you have to performed.... ----- Original Message ----- To: "Multiple recipients of list ORACLE-L" <[EMAIL PROTECTED]> Sent: Thursday, July 03, 2003 1:50 AM Thanks Kirti, We have HP Openview implemented on our database and hence got some alert on redo copy latch. When I have queried the database I found the contention on this latch. Yes we have other performance issues ( HIGH CPU utilization , because of lotta bad code ). and We are checking every possible contention on the database. Question : How can I determine if this redo copy latch is causing the performance issues , guess that is my main question before altering some hidden parameter in init.ora. Madhu Reddy X13944 -----Original Message----- Sent: Wednesday, July 02, 2003 1:56 PM To: Multiple recipients of list ORACLE-L According that suggestion you do seem to have redo copy latch contention. As far as getting that ratio close to suggested value, you may set some special init.ora parameters. There is plenty of notes on Metalink for that. But, you should first determine if this is causing any performance issue. Have you explored all other avenues to address those issues. If not, I would not worry about this contention. - Kirti --- "Reddy, Madhusudana" <[EMAIL PROTECTED]> wrote: > Hello ALL, > > Do you guys think we have redo copy latch contention ?? Also what are your suggestions on tuning > Redo Copy Latch ?? > > > SUBSTR(LN.NAME,1,20) GETS MISSES IMMEDIATE_GETS IMMEDIATE_MISSES > -------------------- ---------- ---------- -------------- ---------------- > redo allocation 943350646 8862115 0 0 > redo copy 22097 497 907958724 1592481 > > 14:54:54 SQL> select (497/22097)*100 from dual; > > (497/22097)*100 ~ (misses/gets)*100 > --------------- > 2.2491741 <------- Oracle suggests it should be under 1% > > > Madhu Reddy > X13944 > > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: Reddy, Madhusudana > 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). __________________________________ Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month! http://sbc.yahoo.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Kirtikumar Deshpande 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: Reddy, Madhusudana 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: Manoj Kumar Jha 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).
