Hello,
On 2013-12-18 10:24:56 -0800, Dong Ye wrote:
> It seems that 0ac5ad5134f2769ccbaefec73844f8504c4d6182 is the culprit
> commit.
How long does a run take to verify the problem? Could you retry with the
patch attached to
http://www.postgresql.org/message-id/20131201114514.GG18793@alap2.anarazel.de
? Based on the theory that it creates many superflous multixacts.
> Flat perf profiles of two such runs look like:
Those aren't really flat profiles tho ;)
> 0ac:
>
> Samples: 706K of event 'cycles', Event count (approx.): 6690377376522
>
>
> + 3.82% postgres postgres [.]
> GetMultiXactIdMembers
Could you expland that one some levels, so we see the callers?
Greetings,
Andres Freund
-- Andres Freund http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training &
Services