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 CE3D553B01 for ; Sun, 8 May 2005 15:15:30 -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 12964-08 for ; Sun, 8 May 2005 18:15:22 +0000 (GMT) Received: from smtp2.versatel.nl (smtp2.versatel.nl [62.58.50.89]) by svr1.postgresql.org (Postfix) with ESMTP id 93A6953B05 for ; Sun, 8 May 2005 15:15:20 -0300 (ADT) Received: (qmail 30089 invoked by uid 10); 8 May 2005 18:15:20 -0000 Received: (vexira-qq 30082-5E8C4A11 invoked from network) 08 May 2005 20:15:20 +0200 Received: from unknown (HELO [81.58.65.37]) ([81.58.65.37]) (envelope-sender ) by smtp2.versatel.nl (qmail-ldap-1.03) with SMTP for < >; 8 May 2005 18:15:20 -0000 Message-ID: <427E736A.4030107@lycos.com> Date: Sun, 08 May 2005 20:15:38 +0000 From: Jeroen van Iddekinge User-Agent: Mozilla Thunderbird 1.0 (X11/20041206) X-Accept-Language: en-us, en MIME-Version: 1.0 To: pgsql-performance@postgresql.org Subject: Re: sequence scan on PK References: <427E2941.9070105@lycos.com> <427E17BC.7050407@arbash-meinel.com> <427E5130.7020702@lycos.com> <427E3BE6.5040702@beccati.com> <427E5B2E.7020001@lycos.com> <427E46C7.1080208@beccati.com> In-Reply-To: <427E46C7.1080208@beccati.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-AntiVirus: checked by Vexira MailArmor (version: 2.0.1.16; VAE: 6.30.0.2; VDF: 6.30.0.11; host: postbode02.zonnet.nl) X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, hits=1.339 tagged_above=0 required=5 tests=AWL, DNS_FROM_RFC_POST, DNS_FROM_RFC_WHOIS X-Spam-Level: * X-Archive-Number: 200505/84 X-Sequence-Number: 12248 Matteo Beccati wrote: > Hi, > >> Yes , it was a bit to high (18) so a lowered it. It speeded up some >> pages for about 5%. > > > 18? The default is 4 if I can remember correctly. I wonder if your db > has ever seen an index scan ;) > I was expermenting how much some setting influence has on the perfomance of some web application. So I think i forgot to change the setting back and got some strange query plans. Thanks Jer