Re: Parallel Select query performance and shared buffers

Metin Doslu wrote:

> When we send concurrent Select queries to these tables, query performance
> doesn't scale out with the number of CPU cores. We find that complex Select
> queries scale out better than simpler ones. We also find that increasing
> the block size from 8 KB to 32 KB, or increasing shared_buffers to include
> the working set mitigates the problem to some extent.

Maybe you could help test this patch:
http://www.postgresql.org/message-id/20131115194725.GG5489@awork2.anarazel.de

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Álvaro Herrera                http://www.2ndQuadrant.com/
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