On Tue, 2002-03-05 at 15:59, Bruce Momjian wrote:
> > > > If they do not affect performance, then why have them off?
> > >
> > > I think Jan said 2-3%. If we can get autovacuum from it, it would be a
> > > win to keep it on all the time, perhaps.
> >
> > Assuming that the statistics get updated:
> >
> > How often should the sats table be queried?
> > What sort of configurability would be needed?
>
> You could wake up every few minutes and see how the values have changed.
> I don't remember if there is a way to clear that stats so you can see
> just the changes in the past five minutes. Vacuum the table that had
> activity.
Ick -- polling. The statistics process should be able to wake somebody
up / notify the postmaster when the statistics change such that a vacuum
is required.
Neil
--
Neil Padgett
Red Hat Canada Ltd. E-Mail: npadgett@redhat.com
2323 Yonge Street, Suite #300,
Toronto, ON M4P 2C9
