Hey all, I have a problem which I speculate to be due to the pg_upgrade bug [1]: ERROR: could not access status of transaction 13636 DETAIL: could not open file "pg_clog/0000": No such file or directory The pg_clog directory contains files with names in the range from 004A to 0105. 004A dates January 2012, 0105 is as of today. my version of postgresql is 9.1.3-1PGDG.rhel6.x86_64 running on CentOS 6.2. We pg_upgraded from 8.4.2 to 9.0.2 (Feb 2011) and then to 9.1.1 (Oct 2011). Unfortunately, I do not have backups of the pg_clog before upgrading to 9.1. I immediately stopped the database when encountering these errors above. To me (naive) it looks like the pg_clog file names "wrapped around" and now start to re-use from 0000 on (which does not exist). Is there any chance I can fix this (and avoid data loss)? I did not apply the VACUUM FREEZE fix suggested in [1] because I could not restore missing pg_clog files. What can I do? Thanks in advance, Chris [1]: http://wiki.postgresql.org/wiki/20110408pg_upgrade_fix -- Christian J. Dietrich Institute for Internet Security - if(is) Westfaelische Hochschule University of Applied Sciences https://www.internet-sicherheit.de -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general