bad performance on SMP

From: "Luis Alberto Amigo Navarro" <lamigo(at)atc(dot)unican(dot)es>
To: <pgsql-hackers(at)postgresql(dot)org>
Subject: bad performance on SMP
Date: 2002-03-12 16:34:03
Message-ID: 006401c1c9e3$b8b4f270$cab990c1@atc.unican.es
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We're running on a 8 r10000 powerchallenge, and results improve from 1 to 5 streams, but from 5 and above results become steady, machine usages reports it's able to manage more workload.
We're running postgres 7.2, it has about 640Mb of shared memory.
Any tip?
Thank in advance

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