Mike White <mikewhite22@yahoo.com> writes:
> I've noticed that the pg_lock table shows two AccessExclusiveLock
> entries that are completely identical. Is this a sign of internal
> deadlock, or is this behavior expected during VACUUM FULL operation?
I think it's just the regular and session versions of the lock. Don't
recall at the moment whether it's easier to tell them apart in newer
releases.
> Also, please don't tell me to upgrade.
You should *definitely* be on 7.4.x where x is considerably greater than
7. This is a painless update and failing to do it borders on negligence.
Read the release notes at
http://www.postgresql.org/docs/7.4/static/release.html
regards, tom lane