Received: from localhost (unknown [200.46.204.183]) by postgresql.org (Postfix) with ESMTP id DFD9864FC24 for ; Wed, 24 Sep 2008 12:53:45 -0300 (ADT) Received: from postgresql.org ([200.46.204.86]) by localhost (mx1.hub.org [200.46.204.183]) (amavisd-maia, port 10024) with ESMTP id 44989-03 for ; Wed, 24 Sep 2008 12:53:43 -0300 (ADT) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from sss.pgh.pa.us (sss.pgh.pa.us [66.207.139.130]) by postgresql.org (Postfix) with ESMTP id 1268264FC1E for ; Wed, 24 Sep 2008 12:53:42 -0300 (ADT) Received: from sss2.sss.pgh.pa.us (tgl@localhost [127.0.0.1]) by sss.pgh.pa.us (8.14.2/8.14.2) with ESMTP id m8OFrbnS005072; Wed, 24 Sep 2008 11:53:37 -0400 (EDT) To: Carol Walter cc: Scott Marlowe , Tena Sakai , pgsql-admin@postgresql.org Subject: Re: Missing pg_clog files In-reply-to: References: <1B5F9FC4-578A-44FA-8264-FC674CF5A0FD@indiana.edu> <20080923215948.m743u3mtcwg88s4o@webmail.iu.edu> <20080924071308.8lficujqsck8w44w@webmail.iu.edu> <052D4170-A065-4DDB-9F9D-6318E42C23BA@indiana.edu> <29313.1222261821@sss.pgh.pa.us> Comments: In-reply-to Carol Walter message dated "Wed, 24 Sep 2008 09:41:28 -0400" Date: Wed, 24 Sep 2008 11:53:37 -0400 Message-ID: <5071.1222271617@sss.pgh.pa.us> From: Tom Lane X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=0 tagged_above=0 required=5 tests=none X-Spam-Level: X-Archive-Number: 200809/282 X-Sequence-Number: 30375 Carol Walter writes: > Here is the results of the query you asked for. > datname | datfrozenxid > ------------------+-------------- > postgres | 524 > ... Huh. Postgres should never have removed any of those files with datfrozenxid this low. So it seems we have two possible explanations: * there's something subtly wrong with the TruncateCLOG logic * the files were removed by something else, ie, human error or operating-system failure regards, tom lane