X-Original-To: pgsql-performance-postgresql.org@localhost.postgresql.org Received: from localhost (av.hub.org [200.46.204.144]) by postgresql.org (Postfix) with ESMTP id D7FE89DCC7E for ; Mon, 27 Mar 2006 10:31:50 -0400 (AST) Received: from postgresql.org ([200.46.204.71]) by localhost (av.hub.org [200.46.204.144]) (amavisd-new, port 10024) with ESMTP id 76368-06 for ; Mon, 27 Mar 2006 10:31:52 -0400 (AST) X-Greylist: from auto-whitelisted by SQLgrey- Received: from noel.decibel.org (noel.decibel.org [67.100.216.10]) by postgresql.org (Postfix) with ESMTP id 748AC9DCCD2 for ; Mon, 27 Mar 2006 10:31:44 -0400 (AST) Received: by noel.decibel.org (Postfix, from userid 1001) id C5B3656423; Mon, 27 Mar 2006 08:31:48 -0600 (CST) Received: (hashcash-sendmail, from uid 1001); Mon, 27 Mar 2006 08:31:48 -0600 Date: Mon, 27 Mar 2006 08:31:48 -0600 From: "Jim C. Nasby" To: luchot Cc: "pgsql-performance@postgresql.org" Subject: Re: Query parallelism Message-ID: <20060327143147.GU80726@pervasive.com> References: <16175346.1143469525456.JavaMail.www@wwinf4002> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <16175346.1143469525456.JavaMail.www@wwinf4002> X-Operating-System: FreeBSD 6.0-RELEASE-p4 amd64 X-Distributed: Join the Effort! http://www.distributed.net User-Agent: Mutt/1.5.11 X-Hashcash: 1:20:060327:luchot@voila.fr::RUsw/R8KsdlaPhZm:000iDc X-Hashcash: 1:20:060327:pgsql-performance@postgresql.org::ES4SF4ca1qyZS1kv:00000 0000000000000000000000008T5d X-Virus-Scanned: by amavisd-new at hub.org X-Spam-Status: No, score=0.108 required=5 tests=[AWL=0.108] X-Spam-Score: 0.108 X-Spam-Level: X-Archive-Number: 200603/521 X-Sequence-Number: 17958 On Mon, Mar 27, 2006 at 04:25:25PM +0200, luchot wrote: > Hello everybody , > I use PostgreSQL 8.1.3 on a bi-processor Xeon and I would know how to do to enable a parallelism for > the execution of queries. Indeed , when I analyse the use of the cpus during a query the result is that for > some minutes a cpu is used while the other not and after it is the contrary. So they are not used at the same > time and i would know what i have to do in order cpus work together . > Thanks and sorry for my english, PostgreSQL has no support for intra-query parallelism at this time. Greenplum's MPP might do what you're looking for. -- Jim C. Nasby, Sr. Engineering Consultant jnasby@pervasive.com Pervasive Software http://pervasive.com work: 512-231-6117 vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461