From: Christopher Browne <cbbrowne@acm.org>
To: pgsql-performance@postgresql.org
Subject: Re: Default autovacuum settings too conservative
Date: Mon, 06 Feb 2006 22:14:53 -0800
Message-ID: <m38xsn4rvm.fsf@mobile.int.cbbrowne.com> (raw)
References: <20060201211633.GM95850@pervasive.com>
<43E12A03.6070906@zeut.net>
<20060207050545.GZ1240@pervasive.com>
> On Wed, Feb 01, 2006 at 04:37:07PM -0500, Matthew T. O'Connor wrote:
>> I think the default settings should be designed to minimize the impact
>> autovacuum has on the system while preventing the system from ever
>> getting wildly bloated (also protect xid wraparound, but that doesn't
>> have anything to do with the thresholds).
>
> I don't really see the logic behind that. Problems caused by inadequate
> vacuuming seem to be much more prevalent than problems caused by vacuum
> impacting the system. If vacuum impact is a concern I think it more
> reasonable to make the default vacuum_cost_delay non-zero instead.
That's a good point.
I would not be keen, on the other hand, on having the delays terribly
high.
Big tables, if delayed significantly, will take plenty longer to
vacuum, and I always get paranoid about long running transactions :-).
--
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To: pgsql-performance@postgresql.org
Cc: cbbrowne@acm.org
Subject: Re: Default autovacuum settings too conservative
In-Reply-To: <m38xsn4rvm.fsf@mobile.int.cbbrowne.com>
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