On Sun, 2008-11-23 at 14:05 -0500, Tom Lane wrote: > A possible problem is that if a relation is filled all in one shot, > autovacuum would trigger a single vacuum cycle on it and then never have > a reason to trigger another; leading to the bits never getting set (or > at least not till an antiwraparound vacuum occurs). We might want to > tweak autovac so that an extra vacuum cycle occurs in this case. But > I'm not quite sure what a reasonable heuristic would be. >
This would only be an issue if using the visibility map for things other than partial vacuum (e.g. index-only scan), right? If we never do another VACUUM, we don't need partial vacuum. Regards, Jeff Davis -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers