Received: from localhost (maia-1.hub.org [200.46.204.191]) by postgresql.org (Postfix) with ESMTP id D83D19FBCFB for ; Tue, 5 Jun 2007 11:25:44 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.191]) (amavisd-maia, port 10024) with ESMTP id 08425-06-5 for ; Tue, 5 Jun 2007 11:25:36 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey-1.7.4 Received: from nabagan.bluegap.ch (nabagan.bluegap.ch [88.198.58.248]) by postgresql.org (Postfix) with ESMTP id 629449FBCDD for ; Tue, 5 Jun 2007 11:25:36 -0300 (ADT) Received: from [192.168.77.28] (p54BD8AE4.dip0.t-ipconnect.de [::ffff:84.189.138.228]) (AUTH: CRAM-MD5 markus@bluegap.ch, TLS: TLSv1/SSLv3, 256bits, AES256-SHA) by nabagan.bluegap.ch with esmtp; Tue, 05 Jun 2007 17:19:43 +0200 id 00604446.46657F0F.00000FAE Message-ID: <4665725D.6060102@bluegap.ch> Date: Tue, 05 Jun 2007 16:25:33 +0200 From: Markus Schiltknecht User-Agent: Icedove 1.5.0.10 (X11/20070329) MIME-Version: 1.0 To: Heikki Linnakangas CC: pgsql-performance@postgresql.org Subject: Re: dbt2 NOTPM numbers References: <466428F7.5010808@bluegap.ch> <46642B33.6030101@enterprisedb.com> <46642F2E.3080509@bluegap.ch> <4664748B.2060304@enterprisedb.com> <4665703E.3040905@bluegap.ch> <46657180.7010604@enterprisedb.com> In-Reply-To: <46657180.7010604@enterprisedb.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200706/68 X-Sequence-Number: 25101 Hi, Heikki Linnakangas wrote: > Maybe, TPC-C is very write-intensive. I don't know much about RAID > stuff, but I think you'd really benefit from a separate WAL drive. You > could try turning fsync=off to see if that makes a difference. Hm.. good idea, I'll try that. > Oh, and how many connections are you using? DBT-2 can be quite sensitive > to that. 30 seems to work pretty well for me. I've been using between 2 and 90, but that made pretty much no difference at all. I'm not getting anything more that some 300 NOTPM. Regards Markus