Received: from makus.postgresql.org (makus.postgresql.org [98.129.198.125]) by mail.postgresql.org (Postfix) with ESMTP id 9F17318BA230 for ; Wed, 18 Apr 2012 21:09:44 -0300 (ADT) Received: from smtp.01.com ([199.36.142.181]) by makus.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1SKewR-0000Y4-PE for pgsql-performance@postgresql.org; Thu, 19 Apr 2012 00:09:44 +0000 Received: from localhost (localhost.localdomain [127.0.0.1]) by smtp-out-2.01.com (Postfix) with ESMTP id DEBC44F55A9 for ; Wed, 18 Apr 2012 19:09:30 -0500 (CDT) X-Virus-Scanned: amavisd-new at smtp-out-2.01.com Received: from smtp.01.com ([127.0.0.1]) by localhost (smtp-out-2.01.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id do9ooRP9hli7 for ; Wed, 18 Apr 2012 19:09:30 -0500 (CDT) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp-out-2.01.com (Postfix) with ESMTP id BE4614F55D6 for ; Wed, 18 Apr 2012 19:09:30 -0500 (CDT) Received: from Sidney-Stratton.local (70-36-143-92.dsl.dynamic.sonic.net [70.36.143.92]) by smtp-out-2.01.com (Postfix) with ESMTPSA id 687814F55A9; Wed, 18 Apr 2012 19:09:30 -0500 (CDT) Message-ID: <4F8F57B9.2030301@agliodbs.com> Date: Wed, 18 Apr 2012 17:09:29 -0700 From: Josh Berkus Organization: PostgreSQL Experts Inc. User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.5; rv:11.0) Gecko/20120327 Thunderbird/11.0.1 MIME-Version: 1.0 To: Steve Crawford CC: pgsql-performance@postgresql.org Subject: Re: Linux machine aggressively clearing cache References: <807948699.229132.1332959858793.JavaMail.root@mail-1.01.com> <4F765515.3050203@agliodbs.com> <4F86F92E.2000108@pinpointresearch.com> In-Reply-To: <4F86F92E.2000108@pinpointresearch.com> X-Enigmail-Version: 1.4 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Pg-Spam-Score: -1.9 (-) X-Archive-Number: 201204/132 X-Sequence-Number: 46778 On 4/12/12 8:47 AM, Steve Crawford wrote: > On 03/30/2012 05:51 PM, Josh Berkus wrote: >> >> So this turned out to be a Linux kernel issue. Will document it on >> www.databasesoup.com. > Anytime soon? About to build two PostgreSQL servers and wondering if you > have uncovered a kernel version or similar issue to avoid. Yeah, I'll blog it. -- Josh Berkus PostgreSQL Experts Inc. http://pgexperts.com