Haribabu Kommi wrote:

> I modified the "autovac_balance_cost" function to balance the costs using
> the number of running workers, instead
> of default vacuum cost parameters.

Just as a heads-up, this patch wasn't part of the commitfest, but I
intend to review it and possibly commit for 9.4.  Not immediately but at
some point.

Arguably this is a bug fix, since the autovac rebalance code behaves
horribly in cases such as the one described here, so I should consider a
backpatch right away.  However I don't think it's a good idea to do that
without more field testing.  Perhaps we can backpatch later if the new
code demonstrates its sanity.

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


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