On Mon, 2007-01-22 at 13:27 -0500, Bruce Momjian wrote:
> Yep, agreed on the random I/O issue. The larger question is if you have
> a huge table, do you care to reclaim 3% of the table size, rather than
> just vacuum it when it gets to 10% dirty? I realize the vacuum is going
> to take a lot of time, but vacuuming to relaim 3% three times seems like
> it is going to be more expensive than just vacuuming the 10% once. And
> vacuuming to reclaim 1% ten times seems even more expensive. The
> partial vacuum idea is starting to look like a loser to me again.
Hold that thought! Read Heikki's Piggyback VACUUM idea on new thread...
--
Simon Riggs
EnterpriseDB http://www.enterprisedb.com