X-Original-To: pgsql-hackers-postgresql.org@localhost.postgresql.org Received: from localhost (unknown [200.46.204.2]) by svr1.postgresql.org (Postfix) with ESMTP id 382D5D1C511 for ; Tue, 9 Mar 2004 16:42:46 +0000 (GMT) Received: from svr1.postgresql.org ([200.46.204.71]) by localhost (neptune.hub.org [200.46.204.2]) (amavisd-new, port 10024) with ESMTP id 89702-02 for ; Tue, 9 Mar 2004 12:42:36 -0400 (AST) Received: from davinci.ethosmedia.com (server228.ethosmedia.com [209.128.84.228]) by svr1.postgresql.org (Postfix) with ESMTP id 26EE5D1DB81 for ; Tue, 9 Mar 2004 12:42:35 -0400 (AST) Received: from [63.195.55.98] (HELO 192.168.1.29) by davinci.ethosmedia.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 4590521; Tue, 09 Mar 2004 08:43:44 -0800 From: Josh Berkus Reply-To: josh@agliodbs.com Organization: Aglio Database Solutions To: Tom Lane , Robert Treat Subject: Re: raising the default default_statistics_target Date: Tue, 9 Mar 2004 08:41:42 -0800 User-Agent: KMail/1.5.4 Cc: pgsql-hackers@postgresql.org, Neil Conway References: <1078842828.22416.335.camel@camel> <25142.1078845079@sss.pgh.pa.us> In-Reply-To: <25142.1078845079@sss.pgh.pa.us> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200403090841.42145.josh@agliodbs.com> X-Virus-Scanned: by amavisd-new at postgresql.org X-Archive-Number: 200403/325 X-Sequence-Number: 50917 Guys, > Hm, that had nothing to do with multi-column correlation though. > I'm at a loss to think of any work that matches with Josh's > recollection. Hmmmm .... it's possible that early e-mails about Manfred's patch claimed to improve performance for multi-column indexes. But it's also possible I'm remembering something else. Darn it, though! 'cause multi-column correlation is one of our big issues on estimates for complex queries. -- -Josh Berkus Aglio Database Solutions San Francisco