Re: Enhancement request

On Dec 2, 2007 6:31 AM, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> wrote:

> Joshua D. Drake escribió:
> > On Fri, 30 Nov 2007 19:34:02 -0300
> > Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> wrote:
> >
> > > Joshua D. Drake escribió:
> > >
> > > > The multi-worker autovacuum is a great new addition to help part of
> > > > that problem (starvation) but it is not help against the other
> > > > (resource consumption, specifically IO).
> > >
> > > Huh, autovac will consume exactly the same amount of I/O as a
> > > user-induced vacuum, so I don't see your point.
> >
> > It can be determined "when" the I/O is used.
>
> Future plans call for being able to change autovac parameters depending
> on time of day, so you will be able to decide that using autovacuum too.
>
> > > Remember, we're not adding VACUUM SCHEMA in 8.2 so it doesn't make any
> > > sense to try to compare it against the old autovac. And you can bet
> > > that in 8.4 autovac will have even more goodies.
> >
> > I assume you mean 8.3, but that is certainly a valid point.
>
> No, I meant 8.4 --- the feature set of 8.3 is already set on stone. So
> VACUUM SCHEMA has to compete with whatever we're able to do for the
> release following that one.

i think even when autovacuum is uber-perfect , the manual overriding
commands like VACUUM and utilities like VACUUMDB will still exist for a long
time to come, so there is a case of improving them if required. Maybe it
would be just easier to add a schema switch to VACUUMDB, which can just
query the catalogs to find which tables to vacuum, this way no parser
changes are involved or any tinkering with the backend code.

>
> --
> Alvaro Herrera
> http://www.advogato.org/person/alvherre
> "Entristecido, Wutra (canción de Las Barreras)
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> y a nosotros al mar"
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