From: Joshua D. Drake <jd@commandprompt.com>
To: Alvaro Herrera <alvherre@alvh.no-ip.org>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Jonah H. Harris <jonah.harris@gmail.com>
Cc: Campbell, Lance <lance@uiuc.edu>
Cc: posgres support <pgsql-admin@postgresql.org>
Subject: Re: Enhancement request
Date: Sat, 1 Dec 2007 12:30:29 -0800
Message-ID: <20071201123029.5776b3c5@jd-laptop> (raw)
In-Reply-To: <20071130223402.GG3175@alvh.no-ip.org>
References: <B10E6810AC2A2F4EA7550D072CDE8760197E2C@SAB-FENWICK.sab.uiuc.edu>
<36e682920711301218m703b3c67s6f547fd7b9b60e7c@mail.gmail.com>
<7099.1196458205@sss.pgh.pa.us>
<36e682920711301332q1cce5db9qe44fb068fcd5608d@mail.gmail.com>
<7341.1196459304@sss.pgh.pa.us>
<20071130140005.18521c54@jd-laptop>
<20071130223402.GG3175@alvh.no-ip.org>
On Fri, 30 Nov 2007 19:34:02 -0300
Alvaro Herrera <alvherre@alvh.no-ip.org> wrote:
> Joshua D. Drake escribió:
>
> > Autovacuum is a great utility for many workloads but even with the
> > upcoming changes I will continually find myself turning off
> > autovacuum for specific relations just so I can turn around and
> > turn on vacuum within cron for others.
> >
> > The multi-worker autovacuum is a great new addition to help part of
> > that problem (starvation) but it is not help against the other
> > (resource consumption, specifically IO).
>
> Huh, autovac will consume exactly the same amount of I/O as a
> user-induced vacuum, so I don't see your point.
It can be determined "when" the I/O is used.
> Remember, we're not adding VACUUM SCHEMA in 8.2 so it doesn't make any
> sense to try to compare it against the old autovac. And you can bet
> that in 8.4 autovac will have even more goodies.
>
I assume you mean 8.3, but that is certainly a valid point.
Sincerely,
Joshua D. Drake
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To: pgsql-admin@postgresql.org
Cc: jd@commandprompt.com, alvherre@alvh.no-ip.org, tgl@sss.pgh.pa.us, jonah.harris@gmail.com, lance@uiuc.edu
Subject: Re: Enhancement request
In-Reply-To: <20071201123029.5776b3c5@jd-laptop>
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