Re: Upgrading postgresql-8.4

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.

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From: Tom Lane [tgl(at)sss(dot)pgh(dot)pa(dot)us]
Sent: Monday, March 11, 2013 12:10 PM
To: Steve Erickson
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: [GENERAL] Upgrading postgresql-8.4

Steve Erickson <serickson(at)digitiliti(dot)com> 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