Received: from magus.postgresql.org ([87.238.57.229]) by malur.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1TVpb1-00047o-K0 for pgsql-performance@postgresql.org; Tue, 06 Nov 2012 20:18:03 +0000 Received: from pro-open.de ([87.106.136.39] helo=www.pro-open.de) by magus.postgresql.org with esmtp (Exim 4.72) (envelope-from ) id 1TVpay-0000Ov-Ja for pgsql-performance@postgresql.org; Tue, 06 Nov 2012 20:18:03 +0000 Received: from [192.168.1.9] (ip-176-198-223-42.unitymediagroup.de [176.198.223.42]) by www.pro-open.de (Postfix) with ESMTP id B9AFE100A0A8; Tue, 6 Nov 2012 21:17:59 +0100 (CET) Message-ID: <50997077.1020500@pro-open.de> Date: Tue, 06 Nov 2012 21:17:59 +0100 From: "Gunnar \"Nick\" Bluth" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121028 Thunderbird/16.0.2 MIME-Version: 1.0 To: Petr Praus CC: Marcos Ortiz , pgsql-performance@postgresql.org, klaussfreire@gmail.com, jeff.janes@gmail.com Subject: Re: Re: Increasing work_mem and shared_buffers on Postgres 9.2 significantly slows down queries References: <5092DE42.5060206@uci.cu> <509304DC.1090809@pro-open.de> <5094F280.6010606@pro-open.de> <50954FAF.3060905@pro-open.de> <50962BCB.7020709@pro-open.de> <50996746.5010508@pro-open.de> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Pg-Spam-Score: -2.3 (--) X-Archive-Number: 201211/72 X-Sequence-Number: 48438 Am 06.11.2012 21:08, schrieb Petr Praus: > > 2MB: http://explain.depesz.com/s/ul1 > 4MB: http://explain.depesz.com/s/IlVu > 10MB: http://explain.depesz.com/s/afx3 > 12MB: http://explain.depesz.com/s/i0vQ > See the change in the plan between 10MB and 12MB, directly at top level? That narrows the thing down quite a bit. Though I wonder why this didn't show in the original plans... -- Gunnar "Nick" Bluth RHCE/SCLA Mobil +49 172 8853339 Email: gunnar.bluth@pro-open.de __________________________________________________________________________ In 1984 mainstream users were choosing VMS over UNIX. Ten years later they are choosing Windows over UNIX. What part of that message aren't you getting? - Tom Payne