Defn of pg_class.reltuples in 7.2.1?

Ed Loehr <pggeneral@bluepolka.net> writes:

Does pg_class.reltuples include "dead" tuples awaiting vacuuming?

No, at least not when it's been updated by VACUUM; since the VACUUM
will have removed said tuples.

I think it probably does count zombie tuples (ones that are committed
dead, but are still visible to some open transaction so VACUUM couldn't
remove 'em).

regards, tom lane