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help / color / mirror / Atom feedFrom: Simon Riggs <[email protected]>
To: Alvaro Herrera <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: [email protected]
Subject: Re: log_autovacuum
Date: Wed, 18 Apr 2007 08:14:42 +0100
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
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On Tue, 2007-04-17 at 21:45 -0400, Alvaro Herrera wrote:
> Alvaro Herrera wrote:
>
> > Seems fair. Updated patch attached.
> >
> > If there are no further comments, I'll add some docs and apply it later.
>
> If autovacuum_vacuum_cost_delay is set to 20, my pitiful desktop system
> takes 8.4 seconds to analyze a 8000 page table:
>
> DEBUG: "bar": scanned 3000 of 8811 pages, containing 681000 live rows and 0 dead rows; 3000 rows in sample, 2000097 estimated total rows
> LOG: automatic analyze of table "alvherre.public.bar" system usage: CPU 0.00s/0.01u sec elapsed 8.39 sec
>
> So I guess logging on ANALYZE is not that removed from reality.
>
> I also think we should remove these DEBUG messages, that are now
> useless:
>
> DEBUG: autovac: will ANALYZE bar
Looks good.
--
Simon Riggs
EnterpriseDB http://www.enterprisedb.com
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