Re: log_autovacuum

On March 8, 2007 09:53 am, Alvaro Herrera wrote:
> Simon Riggs wrote:
> > log_autovacuum = on produces a single line of output from autovacuum,
> > with additional useful stats. Patch is proving useful in performance
> > testing. Not sure what is intended on logging for 8.3....
> >
> > LOG: autovac "public.w" scans:1 pages:197(-0) tuples:2338(-7199) CPU
> > 0.00s/0.00u sec elapsed 0.39 sec
> > LOG: autovac "public.s" scans:1 pages:1926746(-0)
> > tuples:37000611(-3461867) CPU 99.74s/53.37u sec elapsed 7977.20 sec
>
> I agree something like this is useful, but I'd try to get rid of cryptic
> notation, and maybe split in several message categories if reasonable.
>
> Your proposal is
>
> LOG: autovac "public.w" scans:1 pages:197(-0) tuples:2338(-7199) CPU
> 0.00s/0.00u sec elapsed 0.39 sec
>
> This looks too much like the old VACUUM VERBOSE reporting, which was
> awful. Maybe something like this is better:
>
> LOG: index passes: 1 pages: removed 0, 197 remain tuples: removed 7199,
> 2338 remain CPU usage: whatever CONTEXT: Automatic vacuuming of table
> "database.public.w"
>
> This looks like the sort of thing comparable to picking a bikeshed color
> though :-(
>
> Keep in mind that it's going to be translated, so it's not useful for
> machine parsing anyway.

This goes back to the request for vacuum loging to a table..

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