"shakahshakah@gmail.com" <shakahshakah@gmail.com> writes:
> I'm trying to make sense of Section 22.1.3 ("Preventing transaction ID
> wraparound failures") in the on-line docs to make sure the DB's
> autovacuum settings are adequate and are having an effect.
> ...
> I don't see numbers larger than 1 billion in my pg_database columns,
> though.
The pg_database columns only update when you do a database-wide VACUUM,
which is something that autovacuum only undertakes when it sees that
the age values are getting large. I forget the exact threshold, but
at ~28M transactions you are certainly a long way away.
regards, tom lane