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 0E5F79DC81A for ; Fri, 17 Mar 2006 09:35:05 -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 75136-05 for ; Fri, 17 Mar 2006 09:35:08 -0400 (AST) X-Greylist: from auto-whitelisted by SQLgrey- Received: from peufeu.com (boutiquenumerique.com [82.67.9.10]) by postgresql.org (Postfix) with ESMTP id 9AABB9DC83C for ; Fri, 17 Mar 2006 09:35:02 -0400 (AST) Received: (qmail 21220 invoked from network); 17 Mar 2006 14:35:16 +0100 Received: from boutiquenumerique.com (HELO apollo13) (82.67.9.10) by boutiquenumerique.com with SMTP; 17 Mar 2006 14:35:16 +0100 To: "Evgeny Gridasov" , "Kevin Grittner" Cc: pgsql-performance@postgresql.org Subject: Re: Background writer configuration References: <44181A11.EE98.0025.0@wicourts.gov> <20060316211523.73343cee.eugrid@fpm.kubsu.ru> <44198B3D.EE98.0025.0@wicourts.gov> <20060317152448.452e4854.eugrid@fpm.kubsu.ru> Message-ID: From: PFC Content-Type: text/plain; format=flowed; delsp=yes; charset=utf-8 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Date: Fri, 17 Mar 2006 14:35:15 +0100 In-Reply-To: <20060317152448.452e4854.eugrid@fpm.kubsu.ru> User-Agent: Opera M2/8.51 (Linux, build 1462) X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, score=0.109 required=5 tests=[AWL=0.109] X-Spam-Score: 0.109 X-Spam-Level: X-Archive-Number: 200603/269 X-Sequence-Number: 17706 > First of all, I'd like to mention that it was strange to see that > the server performance degraded by 1-2% when we changed kernel/userland > to x86_64 > from default installed i386 userland/amd64 kernel. The operating system > was Debian Linux, > filesystem ext3. Did you use postgres compiled for AMD64 with the 64 kernel, or did you use a 32 bit postgres in emulation mode ?