Received: from maia.hub.org (maia-5.hub.org [200.46.204.29]) by mail.postgresql.org (Postfix) with ESMTP id C7FC51337BC8 for ; Fri, 5 Nov 2010 17:19:47 -0300 (ADT) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.29]) (amavisd-maia, port 10024) with ESMTP id 99998-06 for ; Fri, 5 Nov 2010 20:19:41 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from glacier.frostconsultingllc.com (glacier.frostconsultingllc.com [69.36.227.170]) by mail.postgresql.org (Postfix) with ESMTP id 5FBC31336971 for ; Fri, 5 Nov 2010 17:19:40 -0300 (ADT) Received: from dsl081-245-111.sfo1.dsl.speakeasy.net ([64.81.245.111] helo=Sidney-Stratton.local) by glacier.frostconsultingllc.com with esmtpsa (TLSv1:CAMELLIA256-SHA:256) (Exim 4.69) (envelope-from ) id 1PESl7-00064I-NR for pgsql-performance@postgresql.org; Fri, 05 Nov 2010 13:19:40 -0700 Message-ID: <4CD466D9.80306@agliodbs.com> Date: Fri, 05 Nov 2010 13:19:37 -0700 From: Josh Berkus User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.1b3pre) Gecko/20090223 Thunderbird/3.0b2 MIME-Version: 1.0 To: pgsql-performance@postgresql.org Subject: Re: Major Linux performance regression; shouldn't we be worried about RHEL6? References: <4CD465D8.4070007@agliodbs.com> In-Reply-To: <4CD465D8.4070007@agliodbs.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-1.9 tagged_above=-10 required=5 tests=BAYES_00=-1.9 X-Spam-Level: X-Archive-Number: 201011/63 X-Sequence-Number: 41087 > The serious problems with this appear to be (a) that Linux/Ext4 PG > performance still hasn't fully recovered, and, (b) that RHEL6 is set to > ship with kernel 2.6.32, which means that we'll have a whole generation > of RHEL which is off-limits to PostgreSQL. Oh. Found some other information on the issue. Looks like the problem is fixed in later kernels. So the only real issue is: is RHEL6 shipping with 2.6.32? -- -- Josh Berkus PostgreSQL Experts Inc. http://www.pgexperts.com