Re: Auto Vacuum Daemon (again...)

> > Not sure what you mean by that, but it sounds like the behaviour of my AVD 
> > (having it block until the vacuum command completes) is fine, and perhaps 
> > preferrable. 
> 
> I can easily imagine larger systems with multiple CPUs and multiple disk
> and card bundles to support multiple databases.  In this case, I have a
> hard time figuring out why you'd not want to allow multiple concurrent
> vacuums.  I guess I can understand a recommendation of only allowing a
> single vacuum, however, should it be mandated that AVD will ONLY be able
> to perform a single vacuum at a time?

Hmm.. CPU time (from what I've seen) isn't an issue.  Strictly disk. The
big problem with multiple vacuums is determining which tables are in
common areas.

Perhaps a more appropriate rule would be 1 AVD per tablespace?  Since
PostgreSQL only has a single tablespace at the moment....

-- 
Rod Taylor 

PGP Key: http://www.rbt.ca/rbtpub.asc