Re: Any better plan for this query?.. - Mailing list pgsql-performance

From Simon Riggs
Subject Re: Any better plan for this query?..
Date
Msg-id 1242154017.3843.294.camel@ebony.2ndQuadrant
Whole thread Raw
In response to Any better plan for this query?..  (Dimitri <dimitrik.fr@gmail.com>)
List pgsql-performance
On Tue, 2009-05-12 at 11:30 -0700, Scott Carey wrote:
> the fact is there is no evidence that a connection pooler will fix the
> scalability from 16 > 32 cores.

There has been much analysis over a number of years of the effects of
the ProcArrayLock, specifically the O(N^2) effect of increasing numbers
of connections on GetSnapshotData(). Most discussion has been on
-hackers, not -perform.

--
 Simon Riggs           www.2ndQuadrant.com
 PostgreSQL Training, Services and Support


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