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 673C3DB82F for ; Tue, 15 Nov 2005 15:51:31 -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 96461-02 for ; Tue, 15 Nov 2005 19:51:31 +0000 (GMT) X-Greylist: from auto-whitelisted by SQLgrey- Received: from obelix.askesis.nl (laudanum.demon.nl [82.161.125.16]) by svr1.postgresql.org (Postfix) with ESMTP id 4920EDB7C7 for ; Tue, 15 Nov 2005 15:51:27 -0400 (AST) Received: obelix.askesis.nl 172.31.0.1 from 172.31.1.8 172.31.1.8 via HTTP with MS-WebStorage 6.0.6249 Received: from Panoramix by obelix.askesis.nl; 15 Nov 2005 20:51:28 +0100 Subject: Re: Performance PG 8.0 on dual opteron / 4GB / 3ware From: Joost Kraaijeveld To: Steve Wampler Cc: Luke Lonergan , Dave Cramer , Pgsql-Performance In-Reply-To: <437A39E3.6030707@noao.edu> References: <1132083116.3250.38.camel@Panoramix> <437A39E3.6030707@noao.edu> Content-Type: text/plain Content-Transfer-Encoding: 7bit Date: Tue, 15 Nov 2005 20:51:27 +0100 Message-Id: <1132084287.3250.41.camel@Panoramix> Mime-Version: 1.0 X-Mailer: Evolution 2.2.3 X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, score=0.001 required=5 tests=[UNPARSEABLE_RELAY=0.001] X-Spam-Score: 0.001 X-Spam-Level: X-Archive-Number: 200511/260 X-Sequence-Number: 15517 On Tue, 2005-11-15 at 12:41 -0700, Steve Wampler wrote: > 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. Oooops. This calculation error is not typical for my testing (I think ;-)). -- Groeten, Joost Kraaijeveld Askesis B.V. Molukkenstraat 14 6524NB Nijmegen tel: 024-3888063 / 06-51855277 fax: 024-3608416 e-mail: J.Kraaijeveld@Askesis.nl web: www.askesis.nl