Re: Autovacuum on by default?

Alvaro Herrera wrote:
> Matthew T. O'Connor wrote:
> > Bruce Momjian wrote:
> > >Matthew T. O'Connor wrote:
> > >
> > >>Any chance we can make this change before release? I think it's very
> > >>important to be able to look through the logs and *know* that you tables
> > >>are getting vacuumed or not.
> > >>
> > >
> > >Agreed. I just IM'ed Alvaro and he says pg_stat_activity should now
> > >show exactly what autovacuum is doing (and if it doesn't, let's fix it).
> > >I think that is the best solution to the monitoring problem, rather than
> > >throwing lines in the server logs.
> >
> > I'm not sure I agree with this. I can use the pg_stat_activity table to
> > see if autovacuum is doing something right now, but what I want to be
> > able to do is look through my logs and see that table_foo hasn't been
> > vacuumed since last week, or that table_bar has been vacuumed 7 times
> > today. Can I do that just with the stat system alone?
>
> Actually Larry just reminded us that you can use pg_stat_all_tables to
> see that information. However I'm testing it and it doesn't seem to
> work for all tables ... strange. I'll have a look.

Nevermind -- it's just that if you vacuum a table which you haven't
touched (insert, update, delete) since the last stats reset, then the
vacuum info isn't recorded because we refuse to create the pgstat entry
for the table.

--
Alvaro Herrera http://www.CommandPrompt.com/
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