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 9604952824 for ; Wed, 8 Jun 2005 18:14:16 -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 50942-03 for ; Wed, 8 Jun 2005 21:14:07 +0000 (GMT) Received: from mail.utsl.gen.nz (210-54-92-184.ipnets.xtra.co.nz [210.54.92.184]) by svr1.postgresql.org (Postfix) with ESMTP id 9044C52838 for ; Wed, 8 Jun 2005 18:14:06 -0300 (ADT) Received: by mail.utsl.gen.nz (Postfix, from userid 65534) id 712E711004; Thu, 9 Jun 2005 09:14:08 +1200 (NZST) Received: from [127.0.0.1] (longdrop.clunker.utsl.gen.nz [192.168.255.49]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.utsl.gen.nz (Postfix) with ESMTP id BFA5711002; Thu, 9 Jun 2005 09:14:04 +1200 (NZST) Message-ID: <42A75F9A.3070500@vilain.net> Date: Thu, 09 Jun 2005 09:14:02 +1200 From: Sam Vilain User-Agent: Mozilla Thunderbird 0.9 (X11/20041103) X-Accept-Language: en-us, en MIME-Version: 1.0 To: "Joshua D. Drake" Cc: 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> <42A6034A.90405@commandprompt.com> In-Reply-To: <42A6034A.90405@commandprompt.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=0.207 tagged_above=0 required=5 tests=AWL, FORGED_RCVD_HELO X-Spam-Level: X-Archive-Number: 200506/189 X-Sequence-Number: 12826 Joshua D. Drake wrote: >> 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. Sure. But you get those benefits in 32 or 64-bit mode. Sam.