Received: from magus.postgresql.org (magus.postgresql.org [87.238.57.229]) by mail.postgresql.org (Postfix) with ESMTP id 95A73EC32B9 for ; Thu, 12 Apr 2012 12:48:13 -0300 (ADT) Received: from cerberus.pinpointresearch.com ([66.7.238.130] helo=polaris.pinpointresearch.com) by magus.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1SIMFl-0000vW-Vx for pgsql-performance@postgresql.org; Thu, 12 Apr 2012 15:48:12 +0000 Received: from betelgeuse.pinpointresearch.com (betelgeuse.pinpointresearch.com [192.168.1.179]) by polaris.pinpointresearch.com (Postfix) with ESMTP id CCB7BE00EC82; Thu, 12 Apr 2012 08:47:55 -0700 (PDT) Message-ID: <4F86F92E.2000108@pinpointresearch.com> Date: Thu, 12 Apr 2012 08:47:58 -0700 From: Steve Crawford User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.27) Gecko/20120216 Lightning/1.0b2 Thunderbird/3.1.19 MIME-Version: 1.0 To: Josh Berkus 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> In-Reply-To: <4F765515.3050203@agliodbs.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Pg-Spam-Score: -1.9 (-) X-Archive-Number: 201204/87 X-Sequence-Number: 46733 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. Cheers, Steve