Re: auto vacuuming

On Fri, Mar 31, 2006 at 04:36:10PM -0500, Matthew T. O'Connor wrote:
> Alvaro Herrera wrote:
> >Jim C. Nasby wrote:
> >>On Wed, Mar 29, 2006 at 03:36:36PM +0530, Gourish Singbal wrote:
> >>>we are using postgresql 8.1.3 and wanted to enable autovacuuming for only
> >>>one of the many databases on the same postgresql cluster.
> >>>pg_autovacuum seems to allow to ignore only a particular table and not
> >>>the
> >>>database since column vacrelid is OID from pg_class table Are there any
> >>>suggestions to accomplish this tasks?.
> >>Currently there is no way to exclude entire databases from autovacuum.
> >
> >IIRC in one of the original patches I had added a way to do it. It was
> >rejected however; it was argued that there was another mechanism to
> >disable it. I don't remember what it was though. The only possibility
> >that comes to mind is "ALTER DATABASE SET autovacuum TO off" but I don't
> >see why would it work.
>
>
> I think the closest approximation of disabling autovacuum on a per
> database basis is to connect to the database in question and perform:
>
> update pg_autovacuum set enabled = 'false';
>
> This will prevent autovacuum from vacuuming or analyzing any of the
> tables in the database, but will still check for XID wraparound.

Problem with that is any time you add a table you'd need to re-run that
command. Wouldn't be so bad if we had DDL triggers, but...
--
Jim C. Nasby, Sr. Engineering Consultant jnasby(at)pervasive(dot)com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461