X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (mx1.hub.org [200.46.208.251]) by postgresql.org (Postfix) with ESMTP id EE40111F61DE for ; Wed, 26 Apr 2006 20:54:10 -0300 (ADT) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.208.251]) (amavisd-new, port 10024) with ESMTP id 04167-08 for ; Wed, 26 Apr 2006 20:54:00 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey- Received: from vms044pub.verizon.net (vms044pub.verizon.net [206.46.252.44]) by postgresql.org (Postfix) with ESMTP id 0222D11F60E5 for ; Wed, 26 Apr 2006 20:53:58 -0300 (ADT) Received: from osgiliath.mathom.us ([70.108.132.172]) by vms044.mailsrvcs.net (Sun Java System Messaging Server 6.2-4.02 (built Sep 9 2005)) with ESMTPA id <0IYC00H5CT1Y2SP2@vms044.mailsrvcs.net> for pgsql-performance@postgresql.org; Wed, 26 Apr 2006 18:53:58 -0500 (CDT) Received: from localhost (localhost [127.0.0.1]) by osgiliath.mathom.us (Postfix) with ESMTP id 7948A6E6C1 for ; Wed, 26 Apr 2006 19:53:56 -0400 (EDT) Received: from osgiliath.mathom.us ([127.0.0.1]) by localhost (osgiliath.home.mathom.us [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 10310-03 for ; Wed, 26 Apr 2006 19:53:55 -0400 (EDT) Received: by osgiliath.mathom.us (Postfix, from userid 1000) id 56F966E6C2; Wed, 26 Apr 2006 19:53:55 -0400 (EDT) Date: Wed, 26 Apr 2006 19:53:54 -0400 From: Michael Stone Subject: Re: [Bizgres-general] Introducing a new linux In-reply-to: To: pgsql-performance@postgresql.org Mail-followup-to: pgsql-performance@postgresql.org Message-id: <20060426235352.GD31328@mathom.us> MIME-version: 1.0 Content-type: text/plain; charset=iso-8859-1; format=flowed Content-transfer-encoding: 8BIT Content-disposition: inline X-Pgp-Fingerprint: 53 FF 38 00 E7 DD 0A 9C 84 52 84 C5 EE DF 7C 88 X-Virus-Scanned: Debian amavisd-new at mathom.us References: <20060426222855.GC97354@pervasive.com> User-Agent: Mutt/1.5.11+cvs20060403 X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200604/620 X-Sequence-Number: 18704 On Wed, Apr 26, 2006 at 04:33:40PM -0700, Luke Lonergan wrote: >Išm thinking about it, wešre already using a fixed read-ahead of 16MB using >blockdev on the stock Redhat 2.6.9 kernel, it would be nice to not have to >set this so we may try it. FWIW, I never saw much performance difference from doing that. Wu's patch, OTOH, gave a big boost. Mike Stone