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Re: autovacuum stress-testing our system

From: Simon Riggs <simon(at)2ndQuadrant(dot)com>
To: Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>
Cc: Tomas Vondra <tv(at)fuzzy(dot)cz>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: autovacuum stress-testing our system
Date: 2012-09-27 09:51:28
Message-ID: (view raw or whole thread)
Lists: pgsql-hackers
On 26 September 2012 15:47, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> wrote:
> Really, as far as autovacuum is concerned, it would be much more useful
> to be able to reliably detect that a table has been recently vacuumed,
> without having to request a 10ms-recent pgstat snapshot.  That would
> greatly reduce the amount of time autovac spends on pgstat requests.

VACUUMing generates a relcache invalidation. Can we arrange for those
invalidations to be received by autovac launcher, so it gets immediate
feedback of recent activity without polling?

 Simon Riggs         
 PostgreSQL Development, 24x7 Support, Training & Services

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