"latch: cache buffers chains" wait in NON-RAC Benchmark Runs
From: VIVEK_SHARMA <VIVEK_SHARMA_at_infosys.com>
Date: Fri, 15 Feb 2008 07:43:14 +0530
Message-ID: <69E1360E54B50C4A828A136C158E4742036A707765@BLRKECMBX02.ad.infosys.com>
Date: Fri, 15 Feb 2008 07:43:14 +0530
Message-ID: <69E1360E54B50C4A828A136C158E4742036A707765@BLRKECMBX02.ad.infosys.com>
Folks
In a Benchmark Run, 512 concurrent BATCH Processes using Dedicated Sessions (NON-MTS) showing the following Waits:-
How is the "latch: cache buffers chains" wait to be addressed?
Should "_write_clones" be set to "0"
Current default value is "3"
Will share the Statspack Report, as needed.
Config:-
Oracle 10.2.0.3 ( NON-RAC )
Solaris 10
Cheers
Vivek
Statspack Report :-
Elapsed: 19.23 (mins)
Top 5 Timed Events Avg %Total ~~~~~~~~~~~~~~~~~~ wait Call Event Waits Time (s) (ms) Time ----------------------------------------- ------------ ----------- ------ ------ CPU time 28,932 27.2 latch: cache buffers chains 379,062 18,092 48 17.0 db file scattered read 134,021 17,649 132 16.6 db file sequential read 155,494 13,199 85 12.4 SQL*Net break/reset to client 4,314,656 10,430 2 9.8 ------------------------------------------------------------- ^LHost CPU (CPUs: 120) ~~~~~~~~ Load Average Begin End User System Idle WIO WCPU ------- ------- ------- ------- ------- ------- -------- 1.55 6.65 40.30 30.85 28.84 0.00 77.42 **************** CAUTION - Disclaimer *****************This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely for the use of the addressee(s). If you are not the intended recipient, please notify the sender by e-mail and delete the original message. Further, you are not to copy, disclose, or distribute this e-mail or its contents to any other person and any such actions are unlawful. This e-mail may contain viruses. Infosys has taken every reasonable precaution to minimize this risk, but is not liable for any damage you may sustain as a result of any virus in this e-mail. You should carry out your own virus checks before opening the e-mail or attachment. Infosys reserves the right to monitor and review the content of all messages sent to or from this e-mail address. Messages sent to or from this e-mail address may be stored on the Infosys e-mail system. ***INFOSYS******** End of Disclaimer ********INFOSYS***
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