From: Tom Lane <tgl@sss.pgh.pa.us>
To: Wayne Beaver <wayne@acedsl.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: Manual vacs 5x faster than autovacs?
Date: Thu, 12 Nov 2009 09:49:52 -0500
Message-ID: <24025.1258037392@sss.pgh.pa.us> (raw)
In-Reply-To: <20091112093301.11953uc4r7pgqzy8@www.aceinnovative.com>
References: <20091112093301.11953uc4r7pgqzy8@www.aceinnovative.com>
Wayne Beaver <wayne@acedsl.com> writes:
> Running Pg 8.3RC2, Linux server, w/8GB RAM, OpenSuSE 10.2 OS (yes, I
> know that's old). I have seen *really* long-running autovacs eating up
> system resources. While the below is not an example of *really* long,
> it shows how I killed an autovac which had been running for more than
> 10 minutes, then ran a VAC FULL ANALYZE on same exact table in about
> ~2 min. Any wisdom here? Attributable to autovac_worker settings?
autovacuum_vacuum_cost_delay. Is the slow autovac *really* eating
a noticeable amount of system resources? I would think that a full
speed manual vacuum would be a lot worse.
regards, tom lane
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To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, wayne@acedsl.com
Subject: Re: Manual vacs 5x faster than autovacs?
In-Reply-To: <24025.1258037392@sss.pgh.pa.us>
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