Alvaro Herrera <alvherre@alvh.no-ip.org> writes:
> Hmm. I have a patch for this, but now that it's ready, I wonder if it's
> really needed. If I understand vacuum_set_xid_limits() correctly, it's
> very difficult for the vacuumxid to be far behind the freeze limit.
Umm ... they can be close together, or a billion XIDs apart, depending
on whether the FREEZE option was used.
regards, tom lane