| From: | "Jim C(dot) Nasby" <jnasby(at)pervasive(dot)com> |
|---|---|
| To: | Katsuhiko Okano <okano(dot)katsuhiko(at)oss(dot)ntt(dot)co(dot)jp> |
| Cc: | pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: poor performance with Context Switch Storm at TPC-W. |
| Date: | 2006-07-19 15:35:42 |
| Message-ID: | 20060719153542.GT83250@pervasive.com |
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| Thread: | |
| Lists: | pgsql-hackers pgsql-patches |
On Fri, Jul 14, 2006 at 02:58:36PM +0900, Katsuhiko Okano wrote:
> NOT occurrence of CSStorm. The value of WIPS was about 400.
> (but the value of WIPS fell about to 320 at intervals of 4 to 6 minutes.)
If you haven't changed checkpoint timeout, this drop-off every 4-6
minutes indicates that you need to make the bgwriter more aggressive.
--
Jim C. Nasby, Sr. Engineering Consultant jnasby(at)pervasive(dot)com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
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