Received: from maia.hub.org (maia-3.hub.org [200.46.204.243]) by mail.postgresql.org (Postfix) with ESMTP id AD9BF1337B96 for ; Thu, 20 Jan 2011 13:05:10 -0400 (AST) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.243]) (amavisd-maia, port 10024) with ESMTP id 15368-06 for ; Thu, 20 Jan 2011 17:05:03 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from gw.wicourts.gov (gwmta.wicourts.gov [165.219.244.99]) by mail.postgresql.org (Postfix) with ESMTP id DF08C1337B7D for ; Thu, 20 Jan 2011 13:05:02 -0400 (AST) Received: from Courts-MTA by gw.wicourts.gov with Novell_GroupWise; Thu, 20 Jan 2011 11:05:00 -0600 Message-Id: <4D3816DB02000025000398DF@gw.wicourts.gov> X-Mailer: Novell GroupWise Internet Agent 8.0.1 Date: Thu, 20 Jan 2011 11:04:59 -0600 From: "Kevin Grittner" To: "Charles.Hou" , Subject: Re: the XID question References: <4D36A35302000025000397CC@gw.wicourts.gov> In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Disposition: inline X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-4.21 tagged_above=-10 required=5 tests=BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, T_RP_MATCHES_RCVD=-0.01 X-Spam-Level: X-Archive-Number: 201101/189 X-Sequence-Number: 41976 "Charles.Hou" wrote: > my postgresql version is 8.1.3 Ouch! That's getting pretty old; I hope it's not on Windows. http://wiki.postgresql.org/wiki/PostgreSQL_Release_Support_Policy http://www.postgresql.org/about/news.865 > you means the newer version has a virtual transaction ID. and > what's the maxmium of this virtual id, also 4 billion ? > should i also vacuum freeze the virtual id in the new version when > it reached the 4 billion? The point is to reduce maintenance, not increase it -- you don't need to worry about cleaning these up. -Kevin