| From: | Rod Taylor <rbt(at)rbt(dot)ca> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Neil Conway <neilc(at)samurai(dot)com>, PostgreSQL Development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Row level stats |
| Date: | 2003-03-06 16:55:37 |
| Message-ID: | 1046969736.487.27.camel@jester |
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| Lists: | pgsql-hackers |
On Thu, 2003-03-06 at 11:49, Tom Lane wrote:
> Rod Taylor <rbt(at)rbt(dot)ca> writes:
> > Not if we expect pg_autovacuum to be able to work. It *needs* this
> > information.
>
> Why?
>
> The implementation I've had in mind for autovacuum would rely on FSM not
> the pg_stats daemon.
FSM as I understand it gets it information from vacuum, and has an space
marker removed when an insert uses the tuple.
Determining when vacuum runs would be based more on Deletes / updates
than anything wouldn't it?
Anyhow, I'd be curious to know your full thoughts on autovacuum and how
it may work.
--
Rod Taylor <rbt(at)rbt(dot)ca>
PGP Key: http://www.rbt.ca/rbtpub.asc
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