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 2D40B528D9 for ; Tue, 7 Jun 2005 17:27:59 -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 58487-07 for ; Tue, 7 Jun 2005 20:27:53 +0000 (GMT) Received: from hosting.commandprompt.com (128.commandprompt.com [207.173.200.128]) by svr1.postgresql.org (Postfix) with ESMTP id 711A8528D0 for ; Tue, 7 Jun 2005 17:27:53 -0300 (ADT) Received: from [192.168.1.52] (fc1smp [66.93.38.87]) (authenticated bits=0) by hosting.commandprompt.com (8.12.8/8.12.8) with ESMTP id j57KI5a3008791; Tue, 7 Jun 2005 13:18:05 -0700 Message-ID: <42A6034A.90405@commandprompt.com> Date: Tue, 07 Jun 2005 13:27:54 -0700 From: "Joshua D. Drake" Organization: Command Prompt, Inc. User-Agent: Mozilla Thunderbird 1.0.2-1.3.3 (X11/20050513) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Donald Courtney Cc: Tom Arthurs , pgsql-performance@postgresql.org Subject: Re: Postgresql on an AMD64 machine References: <1118080420.1644.23.camel@penguin1> <42A5F7B6.20502@sun.com> <42A5FB70.8090807@jobflash.com> <42A6014C.30108@sun.com> In-Reply-To: <42A6014C.30108@sun.com> 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=0.017 tagged_above=0 required=5 tests=AWL X-Spam-Level: X-Archive-Number: 200506/148 X-Sequence-Number: 12785 >> > The system has 8 CPUs w/ 32 GB - I'm hoping to see some benefit to large > caches - > Am I missing something key with postgreSQL? > Yes - we have seen with oracle 64 bit that there can be as much as a 10% > hit moving > from 32 - but we make it up big time with large db-buffer sizes that > drastically Well for Opteron you should also gain from the very high memory bandwidth and the fact that it has I believe "3" FP units per CPU. Sincerely, Joshua D. Drake -- Your PostgreSQL solutions company - Command Prompt, Inc. 1.800.492.2240 PostgreSQL Replication, Consulting, Custom Programming, 24x7 support Managed Services, Shared and Dedicated Hosting Co-Authors: plPHP, plPerlNG - http://www.commandprompt.com/