Thanks for the reply. I deleted all rows in pg_statistic and the VACUUM ANALYZE on pg_attribute still fails. I tried to reindex pg_toast_2619 and got an error "could not access status of transaction 1493786085. Could not open file "pg_subtrans/5909": No such file or directory. Sure enough, there is no such file - only 5905. ________________________________________ From: Tom Lane [tgl@xxxxxxxxxxxxx] Sent: Monday, March 11, 2013 12:10 PM To: Steve Erickson Cc: pgsql-general@xxxxxxxxxxxxxx Subject: Re: Upgrading postgresql-8.4 Steve Erickson <serickson@xxxxxxxxxxxxxx> writes: > This went well and postgres restarted just fine. However, now when I execute a pg_dump I get a missing chunk 0 for pg_toast_2619 while querying pg_attribute. I did a reindex on pg_toast_2619, then tried to VACUUM ANALYZE pg_attribute but again got the missing chunk 0 error. > Did I miss a step doing the upgrade or recovery attempt, or is the > data corrupted? It's corrupt, but fortunately for you, 2619 is pg_statistic which is eminently discardable data. Just truncate pg_statistic and you should be good. If you aren't immediately abandoning the old database, you might want to re-ANALYZE everything to reconstruct the stats. We've seen one or two reports like this before, which makes me think there might be a reproducible bug lurking somewhere around here; but I don't suppose you have a recipe for getting a database into this state ... regards, tom lane -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general