From: Jim C. Nasby <jnasby@pervasive.com>
To: Katsuhiko Okano <okano.katsuhiko@oss.ntt.co.jp>
Cc: pgsql-hackers@postgresql.org
Subject: Re: poor performance with Context Switch Storm at TPC-W.
Date: Wed, 19 Jul 2006 10:35:42 -0500
Message-ID: <20060719153542.GT83250@pervasive.com> (raw)
In-Reply-To: <200607141457.CFC04165.PBLJLPVTILUBOPu@oss.ntt.co.jp>
References: <200607112009.FED09315.TLPPUBIBOPuVLJL@oss.ntt.co.jp>
<20060711135951.GA3995@surnet.cl>
<200607141457.CFC04165.PBLJLPVTILUBOPu@oss.ntt.co.jp>
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@pervasive.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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To: pgsql-hackers@postgresql.org
Cc: jnasby@pervasive.com, okano.katsuhiko@oss.ntt.co.jp
Subject: Re: poor performance with Context Switch Storm at TPC-W.
In-Reply-To: <20060719153542.GT83250@pervasive.com>
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