Re: BUG #13750: Autovacuum slows down with large numbers of tables. More workers makes it slower. - Mailing list pgsql-bugs

From Alvaro Herrera
Subject Re: BUG #13750: Autovacuum slows down with large numbers of tables. More workers makes it slower.
Date
Msg-id 20160318221317.GA182976@alvherre.pgsql
Whole thread Raw
In response to Re: BUG #13750: Autovacuum slows down with large numbers of tables. More workers makes it slower.  (David Gould <daveg@sonic.net>)
Responses Re: BUG #13750: Autovacuum slows down with large numbers of tables. More workers makes it slower.
Re: BUG #13750: Autovacuum slows down with large numbers of tables. More workers makes it slower.
List pgsql-bugs
David Gould wrote:

> I have some thoughts for a different approach. In short, the stats collector
> actually knows what needs vacuuming because queries that create dead tuples
> tell it. I'm considering have the stats collector maintain a queue of
> vacuum work and that autovacuum request work from the stats collector. When I
> have something more concrete I'll post it on hackers.

Hm, ideally we would have something backpatchable, but this new idea
doesn't sound so to me.  I think that having some variant of the patch
you proposed previously would be better for the stable branches.

--
Álvaro Herrera                http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services

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