Re: Some thoughts about i/o priorities and throttling vacuum

From: Andrew Sullivan <andrew(at)libertyrms(dot)info>
To: pgsql-hackers(at)postgresql(dot)org
Subject: Re: Some thoughts about i/o priorities and throttling vacuum
Date: 2003-10-17 13:50:07
Message-ID: 20031017135007.GA1089@libertyrms.info
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On Fri, Oct 17, 2003 at 07:04:45PM +0530, Shridhar Daithankar wrote:
> I am slightly confused here. IIRC pg_autovacuum never did a vacuum full. At
> the most it does vacuum /vacuum analyse, none of which chew disk bandwidth.

The latter is false. VACUUM FULL certainly uses _more_ disk
bandwidth than VACUUM, but it's just false that plain VACUUM doesn't
contend for disk. And if you're already maxed, then that extra
bandwidth you cannot afford.

A

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