Re: autovacuum logging, part deux.

On Thu, May 04, 2006 at 12:37:48PM -0400, Rod Taylor wrote:
> On Thu, 2006-05-04 at 11:25 -0500, Larry Rosenman wrote:
> > Rod Taylor wrote:
> > > I don't know about anyone else, but the only time I look at that mess
> > > is to find poor tuple/table or tuple/index ratios and other
> > > indications that vacuum isn't working as well as it should be.
> > > 
> > > How about this instead:
> > > 
> > > Log when the actual autovacuum_vacuum_scale_factor (dead space cleaned
> > > up) was more than 2 times the autovacuum_vacuum_scale_factor listed in
> > > postgresql.conf. This means autovacuum isn't keeping up to what you
> > > want it to.
> > > 
> > > Another interesting case would be a large amount of empty space in the
> > > index or table (say 3x autovacuum_vacuum_scale_factor). This may
> > > indicate unnecessary bloat and something to fix.
> > > 
> > > Aside from that, the raw numbers don't really interest me.
> > >
> > 
> > Does anyone think we should have a stats view for the last vacuum stats
> > for each table?
> 
> This would actually suit me better as it would be trivial to plug into a
> monitoring system with home-brew per table thresholds at that point.

+1. But I also think it would be handy to have some means to better
control autovacuum logging, probably via something like
autovacuum_verbosity.
-- 
Jim C. Nasby, Sr. Engineering Consultant      jnasby@pervasive.com
Pervasive Software      http://pervasive.com    work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf       cell: 512-569-9461