Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1Tul2C-0001iK-LV for pgsql-performance@arkaria.postgresql.org; Mon, 14 Jan 2013 14:29:08 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.72) (envelope-from ) id 1Tul2B-0003nU-Do for pgsql-performance@arkaria.postgresql.org; Mon, 14 Jan 2013 14:29:07 +0000 Received: from magus.postgresql.org ([87.238.57.229]) by malur.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1Tul29-0003mJ-Ro for pgsql-performance@postgresql.org; Mon, 14 Jan 2013 14:29:05 +0000 Received: from [87.118.86.135] (helo=km31432.keymachine.de) by magus.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1Tul24-00056y-Gy for pgsql-performance@postgresql.org; Mon, 14 Jan 2013 14:29:05 +0000 Received: from localhost.localdomain (unknown [88.132.119.133]) by km31432.keymachine.de (Postfix) with ESMTPSA id 02B67390032A; Mon, 14 Jan 2013 14:28:48 +0000 (UTC) Message-ID: <50F41620.4000803@cybertec.at> Date: Mon, 14 Jan 2013 15:28:48 +0100 From: Boszormenyi Zoltan User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130110 Thunderbird/17.0.2 MIME-Version: 1.0 To: sthomas@optionshouse.com CC: AJ Weber , pgsql-performance@postgresql.org Subject: Re: Two Necessary Kernel Tweaks for Linux Systems References: <50E4AAB1.9040902@optionshouse.com> <50EC6549.3090503@optionshouse.com> <50EC6742.4090303@optionshouse.com> <50EC743E.1040209@optionshouse.com> <50EC7C24.2020203@comcast.net> <50EC9436.7050700@optionshouse.com> In-Reply-To: <50EC9436.7050700@optionshouse.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable X-Host-Lookup-Failed: Reverse DNS lookup failed for 87.118.86.135 (deferred) X-Pg-Spam-Score: -1.1 (-) List-Archive: List-Help: List-ID: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: X-Mailing-List: pgsql-performance Precedence: bulk Sender: pgsql-performance-owner@postgresql.org 2013-01-08 22:48 keltez=E9ssel, Shaun Thomas =EDrta: > On 01/08/2013 02:05 PM, AJ Weber wrote: > >> Is there an "easy" way to tell what scheduler my OS is using? > > Unfortunately not. I looked again, and it seems that CFS was merged into = 2.6.23.=20 > Anything before that is probably safe, but the vendor may have backported= it. If you=20 > don't see the settings I described, you probably don't have it. > > So I guess Midge had 2.6.18, which predates the merge in 2.6.23. > > I honestly don't understand the Linux kernel sometimes. A process schedul= er swap is a=20 > *gigantic* functional change, and it's in a dot release. I vastly prefer = PostgreSQL's=20 > approach... The kernel version numbering is different. A point release in 2.6.x is 2.6.x.y. This has changed in 3.x, a point release is 3.x.y. Best regards, Zolt=E1n B=F6sz=F6rm=E9nyi --=20 ---------------------------------- Zolt=E1n B=F6sz=F6rm=E9nyi Cybertec Sch=F6nig & Sch=F6nig GmbH Gr=F6hrm=FChlgasse 26 A-2700 Wiener Neustadt, Austria Web: http://www.postgresql-support.de http://www.postgresql.at/ --=20 Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance