Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1WUftZ-0003Se-MB for pgsql-performance@arkaria.postgresql.org; Mon, 31 Mar 2014 17:21:13 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.80) (envelope-from ) id 1WUftZ-000204-6g for pgsql-performance@arkaria.postgresql.org; Mon, 31 Mar 2014 17:21:13 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1WUftY-0001zs-EJ for pgsql-performance@postgresql.org; Mon, 31 Mar 2014 17:21:12 +0000 Received: from mail-lb0-f179.google.com ([209.85.217.179]) by magus.postgresql.org with esmtp (Exim 4.80) (envelope-from ) id 1WUftW-00055R-6j for pgsql-performance@postgresql.org; Mon, 31 Mar 2014 17:21:12 +0000 Received: by mail-lb0-f179.google.com with SMTP id p9so6137451lbv.10 for ; Mon, 31 Mar 2014 10:21:09 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:content-type:mime-version:subject:from :in-reply-to:date:cc:content-transfer-encoding:message-id:references :to; bh=xmmdLSGI28IgaczJlVd/fJFD4zJ0MyQVCm7DnHJ8AHs=; b=PX1nAznIyhfaTPJGChhsjOpi2lnYTH5Wy3iOgVgc0qP8UISRNDq5nsKH9vCYoOw6wG ZXA83P1ztLvvQ/YRLQQf9aX3/HfuwiGKSuk6fxLKOQVN9ywjJASKN176Vi0ORVuigjkt Kf4K6Je6RkCeewmMtNGIbjUSbePsxpchZVOtiUBM7zOxz15429TB/QwufYT8fNgJ3sUP sJ/9ic3z/I8QmX8CtmZqkZI4T4EfOR1Tx6+q/hdxSVyWnxSbzy/iCrQaB59lYjx3gwwX +g0VDqS4eqQTMQ/SDWPJ7/kXIjZpRkZpm6pmC13Ur06Fc6t8a8A84g3LE2U4vTOvVe5L 7SdQ== X-Gm-Message-State: ALoCoQk87hyOf5eJDQqj5PbVFqmWK2LUOleXq1SIhzf2mB5cq7kphjW4Cl0qJyGItr+DD3pIUh5D X-Received: by 10.112.147.136 with SMTP id tk8mr21969lbb.95.1396286469236; Mon, 31 Mar 2014 10:21:09 -0700 (PDT) Received: from [192.168.0.16] (x1-6-84-1b-5e-20-07-92.cpe.webspeed.dk. [80.167.117.15]) by mx.google.com with ESMTPSA id d4sm10303094lbr.27.2014.03.31.10.21.07 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 31 Mar 2014 10:21:08 -0700 (PDT) Content-Type: text/plain; charset=windows-1252 Mime-Version: 1.0 (Mac OS X Mail 7.2 \(1874\)) Subject: Re: Sudden crazy high CPU usage From: =?windows-1252?Q?Niels_Kristian_Schj=F8dt?= In-Reply-To: Date: Mon, 31 Mar 2014 19:21:05 +0200 Cc: Merlin Moncure , "pgsql-performance@postgresql.org list" Content-Transfer-Encoding: quoted-printable Message-Id: <794FDEE2-FAC1-4201-AD09-6BCB26234348@autouncle.com> References: <24BBD031-7384-4FFF-848B-90F5664C0063@autouncle.com> <2ABC90E9-8312-45A4-96E0-CFE202CCD9CE@autouncle.com> To: Scott Marlowe X-Mailer: Apple Mail (2.1874) X-Pg-Spam-Score: -2.6 (--) 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 Thanks, I don=92t think overheating is an issue, it=92s a large dell server= , and I have checked the historic CPU temperature in the servers control pa= nel, and no overheating has shown. Zone_reclaim_mode is already set to 0=20 Den 31/03/2014 kl. 16.50 skrev Scott Marlowe : > On Mon, Mar 31, 2014 at 8:24 AM, Niels Kristian Schj=F8dt > wrote: >>=20 >> Thanks, this seems to persist after a reboot of the server though, and I= have never in my server's 3 months life time experienced anything like it. >=20 > Could it be overheating and therefore throttling the cores? >=20 > Also another thing to look at on large memory machines with > 1 CPU > socket is zone_reclaim_mode being set to 1. Always set it to 0 on a > linux machine running postgres. --=20 Sent via pgsql-performance mailing list (pgsql-performance@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance