X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (unknown [200.46.204.144]) by svr1.postgresql.org (Postfix) with ESMTP id D064B52CB4 for ; Mon, 18 Jul 2005 11:31:51 -0300 (ADT) Received: from svr1.postgresql.org ([200.46.204.71]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 43273-05 for ; Mon, 18 Jul 2005 14:31:47 +0000 (GMT) Received: from outbound.mailhop.org (outbound.mailhop.org [63.208.196.171]) by svr1.postgresql.org (Postfix) with ESMTP id 3D7FC52CB0 for ; Mon, 18 Jul 2005 11:31:46 -0300 (ADT) Received: from ool-4350c7ad.dyn.optonline.net ([67.80.199.173] helo=[192.168.0.66]) by outbound.mailhop.org with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.51) id 1DuWer-000Lcw-3O; Mon, 18 Jul 2005 10:31:49 -0400 X-Mail-Handler: MailHop Outbound by DynDNS.org X-Originating-IP: 67.80.199.173 X-Report-Abuse-To: abuse@dyndns.org (see http://www.mailhop.org/outbound/abuse.html for abuse reporting information) X-MHO-User: zeut Message-ID: <42DBBD4A.6030209@zeut.net> Date: Mon, 18 Jul 2005 10:31:38 -0400 From: "Matthew T. O'Connor" Organization: Terrie O'Connor Realtors User-Agent: Mozilla Thunderbird 1.0.2 (Windows/20050317) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Tom Lane Cc: Robert Creager , PGPerformance , Andy Hewitt Subject: Re: Huge performance problem between 7.4.1 and 8.0.3 - References: <20050717213416.59dcb52e@thunder.logicalchaos.org> <24520.1121659853@sss.pgh.pa.us> <20050717235630.26a7c979@thunder.logicalchaos.org> <2466.1121692991@sss.pgh.pa.us> In-Reply-To: <2466.1121692991@sss.pgh.pa.us> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, hits=0.003 tagged_above=0 required=5 tests=AWL X-Spam-Level: X-Archive-Number: 200507/260 X-Sequence-Number: 13501 Tom Lane wrote: >Robert Creager writes: > > >>I've "vacuum_cost_delay = 10" in the conf file for 803. >> >> > >Hmm, did you read this thread? >http://archives.postgresql.org/pgsql-performance/2005-07/msg00088.php > >It's still far from clear what's going on there, but it might be >interesting to see if turning off the vacuum delay changes your results >with 8.0. > With the contrib autovacuum code if you don't specify vacuum delay settings from the command line, then autovacuum doesn't touch them. Therefore (if you aren't specifying them from the command line), on 803, the vacuum delay settings should be the same for a cron issued vacuum and an autovacuum issued vacuum. So if the vacuum delay settings are the problem, then it should show up either way. Matt