X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (av.hub.org [200.46.204.144]) by postgresql.org (Postfix) with ESMTP id 1E0A19DCB87 for ; Wed, 7 Dec 2005 14:33:52 -0400 (AST) Received: from postgresql.org ([200.46.204.71]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 23131-05 for ; Wed, 7 Dec 2005 14:33:51 -0400 (AST) X-Greylist: from auto-whitelisted by SQLgrey- Received: from mail.gmx.net (mail.gmx.de [213.165.64.20]) by postgresql.org (Postfix) with SMTP id 051019DCB80 for ; Wed, 7 Dec 2005 14:33:48 -0400 (AST) Received: (qmail invoked by alias); 07 Dec 2005 18:33:48 -0000 Received: from p54A64EC2.dip.t-dialin.net (EHLO athlon1000) [84.166.78.194] by mail.gmx.net (mp033) with SMTP; 07 Dec 2005 19:33:48 +0100 X-Authenticated: #594052 Received: from localhost (HELO [127.0.0.1]) [127.0.0.1] by athlon1000 (192.0.0.9) (userid 3) with ESMTP (Classic Hamster Version 2.1 Build 2.1.0.0) ; Wed, 07 Dec 2005 19:33:38 +0100 Message-ID: <43972B01.3070709@gmx.de> Date: Wed, 07 Dec 2005 19:33:37 +0100 From: Stephan Vollmer User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.12) Gecko/20050923 Thunderbird/1.0.7 Mnenhy/0.7.2.0 X-Accept-Language: en-us, en MIME-Version: 1.0 To: pgsql-performance@postgresql.org Subject: Re: First query is slow, subsequent queries fast References: <4396BD7B.1050708@gmx.de> In-Reply-To: X-Enigmail-Version: 0.93.0.0 OpenPGP: id=8D46FCF8 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Posting-Agent: Hamster/2.1.0.0 X-Y-GMX-Trusted: 0 X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, score=0 required=5 tests=[none] X-Spam-Score: 0 X-Spam-Level: X-Archive-Number: 200512/234 X-Sequence-Number: 16055 Hi Oleg, thanks for your quick reply! Oleg Bartunov wrote: > you cache is too low :) Try to increase shared_buffers, for example, > for 2Gb I'd set it to 100,000 Ok, I set shared_buffers to 100000 and indeed it makes a big difference. Other queries than the ones I mentioned are faster, too. Thanks very much for your help, - Stephan