Excerpts from Gordon Shannon's message of mié may 19 11:49:45 -0400 2010:
> at: last analysis tuples = pg_class.reltuples ????
>
> I'm the least confident about the last one -- tuples as of last analyze.
> Can anyone confirm or correct these?
In 8.4 it's number of dead + lives tuples that there were in the previous
analyze. See pgstat_recv_analyze in src/backend/postmaster/pgstat.c.
(In 9.0 it's been reworked a bit.)
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