On Fri, 2003-08-22 at 10:45, Tom Lane wrote: > Jan Wieck <[EMAIL PROTECTED]> writes: > Right. One big question mark in my mind about these "partial vacuum" > proposals is whether they'd still allow adequate FSM information to be > maintained. If VACUUM isn't looking at most of the pages, there's no > very good way to acquire info about where there's free space.
Well, pg_autovacuum really needs to be looking at the FSM anyway. It could look at the FSM, and choose to to do a vacuum normal when there the amount of FSM data becomes inadequate. Of course I'm not sure how you would differentiate a busy table with "inadequate" FSM data and an inactive table that doesn't even register in the FSM. Perhaps you would still need to consult the stats system. ---------------------------(end of broadcast)--------------------------- TIP 6: Have you searched our list archives? http://archives.postgresql.org