X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (av.hub.org [200.46.204.144]) by svr1.postgresql.org (Postfix) with ESMTP id 703FADB863 for ; Tue, 15 Nov 2005 15:41:28 -0400 (AST) 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 94531-02 for ; Tue, 15 Nov 2005 19:41:28 +0000 (GMT) X-Greylist: from auto-whitelisted by SQLgrey- Received: from noao.edu (noao.edu [140.252.1.54]) by svr1.postgresql.org (Postfix) with ESMTP id AEEBADB81F for ; Tue, 15 Nov 2005 15:41:25 -0400 (AST) X-TFF-CGPSA-Version: 1.4f1 X-TFF-CGPSA-Filter: Scanned Received: from weaver.tuc.noao.edu ([140.252.14.8] verified) by noao.edu (CommuniGate Pro SMTP 5.0.1) with ESMTPS id 21653526; Tue, 15 Nov 2005 12:41:24 -0700 Received: from [127.0.0.1] (localhost.localdomain [127.0.0.1]) by weaver.tuc.noao.edu (8.13.1/8.13.1) with ESMTP id jAFJfNhp000509; Tue, 15 Nov 2005 12:41:23 -0700 Message-ID: <437A39E3.6030707@noao.edu> Date: Tue, 15 Nov 2005 12:41:23 -0700 From: Steve Wampler User-Agent: Mozilla Thunderbird 1.0.7 (X11/20050923) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Joost Kraaijeveld CC: Luke Lonergan , Dave Cramer , Pgsql-Performance Subject: Re: Performance PG 8.0 on dual opteron / 4GB / 3ware References: <1132083116.3250.38.camel@Panoramix> In-Reply-To: <1132083116.3250.38.camel@Panoramix> Content-Type: text/plain; charset=ISO-8859-13 Content-Transfer-Encoding: 7bit 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: 200511/259 X-Sequence-Number: 15516 Joost Kraaijeveld wrote: > If I understand correctly (I have 4GB ram): > > jkr@Panoramix:~/tmp$ dd if=/dev/zero of=bigfile bs=8k count=1000000 > 1000000+0 records in > 1000000+0 records out > 8192000000 bytes transferred in 304.085269 seconds (26939812 bytes/sec) > > Which looks suspicious: 26308 MB/sec??? Eh? That looks more like ~25.7 MB/sec, assuming 1MB = 1024*1024 bytes. -- Steve Wampler -- swampler@noao.edu The gods that smiled on your birth are now laughing out loud.