Received: from localhost (maia-2.hub.org [200.46.204.187]) by postgresql.org (Postfix) with ESMTP id CF5169FA0EF for ; Wed, 13 Dec 2006 14:47:41 -0400 (AST) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.187]) (amavisd-new, port 10024) with ESMTP id 81756-07 for ; Wed, 13 Dec 2006 14:47:32 -0400 (AST) X-Greylist: from auto-whitelisted by SQLgrey-1.7.4 Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by postgresql.org (Postfix) with ESMTP id 30E729FA249 for ; Wed, 13 Dec 2006 14:47:34 -0400 (AST) Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1]) by sss.pgh.pa.us (8.13.6/8.13.6) with ESMTP id kBDIlGLd010220; Wed, 13 Dec 2006 13:47:17 -0500 (EST) To: Mark Lewis cc: Arnaud Lesauvage , Ragnar , Jens Schipkowski , pgsql-performance@postgresql.org Subject: Re: Slow update with simple query In-reply-to: <1166032273.27428.98.camel@archimedes> References: <457FDB1E.6040801@freesurf.fr> <457FF0CD.4050606@freesurf.fr> <4580025D.2040903@freesurf.fr> <1166021340.6369.103.camel@localhost.localdomain> <45801A1B.6070200@freesurf.fr> <8399.1166028385@sss.pgh.pa.us> <1166032273.27428.98.camel@archimedes> Comments: In-reply-to Mark Lewis message dated "Wed, 13 Dec 2006 09:51:13 -0800" Date: Wed, 13 Dec 2006 13:47:16 -0500 Message-ID: <10219.1166035636@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200612/331 X-Sequence-Number: 22387 Mark Lewis writes: > But he's using 8.1.4-- in that version, an explain analyze would list > the time taken to go through triggers, so the fact that we don't see any > of those lines means that it can't be constraint checking, so wouldn't > it have to be the index update overhead? Well, it can't be foreign key checking. Could have been an expensive function in a CHECK constraint, maybe... regards, tom lane