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Re: Problem with 8.4 stats collector high load

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
Cc: Jakub Ouhrabka <jakub(dot)ouhrabka(at)comgate(dot)cz>, Jakub Ouhrabka <kuba(at)comgate(dot)cz>, Greg Smith <greg(at)2ndquadrant(dot)com>, pgsql-hackers(at)postgresql(dot)org
Subject: Re: Problem with 8.4 stats collector high load
Date: 2010-02-16 23:05:31
Message-ID: 18715.1266361531@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Alvaro Herrera <alvherre(at)commandprompt(dot)com> writes:
> Jakub Ouhrabka wrote:
>> Was autovacuum requesting to write this 20MB file 650x per minute?

> Yes, exactly.

> Ideally, autovacuum would only request a new copy of the file if the one
> it got was considerably out of date.  Obviously a tenth of a second is
> not old enough.

Wasn't it you that insisted on a short staleness criterion for autovac
in the first place?

			regards, tom lane

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