Received: from localhost (maia-1.hub.org [200.46.204.191]) by postgresql.org (Postfix) with ESMTP id 2F3DF9FB27A for ; Thu, 11 Jan 2007 14:07:34 -0400 (AST) Received: from postgresql.org ([200.46.204.71]) by localhost (mx1.hub.org [200.46.204.191]) (amavisd-new, port 10024) with ESMTP id 15807-09 for ; Thu, 11 Jan 2007 14:07:22 -0400 (AST) X-Greylist: from auto-whitelisted by SQLgrey-1.7.4 Received: from mail.trinitydigital.com.au (unknown [202.134.38.99]) by postgresql.org (Postfix) with ESMTP id 0CEFA9FB278 for ; Thu, 11 Jan 2007 14:07:23 -0400 (AST) Received: from [172.17.73.3] (unknown [202.134.38.110]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.trinitydigital.com.au (Postfix) with ESMTP id 8ACE2CAF; Fri, 12 Jan 2007 05:07:17 +1100 (EST) Message-ID: <45A67CDB.1000706@pws.com.au> Date: Fri, 12 Jan 2007 05:07:23 +1100 From: Russell Smith User-Agent: Thunderbird 1.5.0.9 (Windows/20061207) MIME-Version: 1.0 To: Kim CC: pgsql-performance@postgresql.org Subject: Re: unusual performance for vac following 8.2 upgrade References: <45A671CD.1050706@myemma.com> In-Reply-To: <45A671CD.1050706@myemma.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: Maia Mailguard 1.0.1 X-Archive-Number: 200701/175 X-Sequence-Number: 22776 Kim wrote: > OS: Solaris 10 > write transactions/hr: 1.5 million > size of pg_class: 535,226 > number of relations: 108,694 > That is a huge pg_class. I remember some discussion recently about problems with 8.2 and the way it scans pg_class. I also believe it's fixed in 8.2.1. Are you running that. If not, I suggest you upgrade and see if the fault still exists. Regards Russell Smith > Thanks to all, > > Kim > > ---------------------------(end of broadcast)--------------------------- > TIP 7: You can help support the PostgreSQL project by donating at > > http://www.postgresql.org/about/donate > >