To: "Joshua D. Drake" <jd@commandprompt.com>
cc: "Jonah H. Harris" <jonah.harris@gmail.com>, "Campbell,
	Lance" <lance@uiuc.edu>, "posgres support" <pgsql-admin@postgresql.org>
Subject: Re: Enhancement request 
In-reply-to: <20071130140005.18521c54@jd-laptop> 
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>
Comments: In-reply-to "Joshua D. Drake" <jd@commandprompt.com>
	message dated "Fri, 30 Nov 2007 14:00:05 -0800"
Date: Fri, 30 Nov 2007 22:44:18 -0500
Message-ID: <10684.1196480658@sss.pgh.pa.us>
From: Tom Lane <tgl@sss.pgh.pa.us>

"Joshua D. Drake" <jd@commandprompt.com> writes:
> Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> So: show me a use case for this that will still make sense in a
>> mostly-autovacuum world.

> I think you are living in a different world than I am if you think it
> is a mostly-autovacuum world.

Certainly it isn't a mostly-autovacuum world in 8.2 or earlier releases,
but that's irrelevant to whether it makes sense to expend effort on a
feature that would appear (at the earliest) in 8.4.  Autovac in 8.3 is
very significantly ahead of where it was in 8.2 --- to the point that
we've turned it on by default --- and I predict that the pressure of
being on by default will really light the afterburners behind its
development.  I think it's entirely likely that by the time 8.4 is
ready, it will be perfectly fair to characterize manual vacuuming
as a buggy-whip technology, at least for all but the
three-sigmas-above-normal users.  And I'd *much* rather see development
effort going into making that vision come true, than into adding
questionably-useful complexity in the support for manual vacuuming.

			regards, tom lane