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Pg on SMP half-powered

From: Víctor Romero <romero(at)kde(dot)org>
To: pgsql-hackers(at)postgresql(dot)org
Subject: Pg on SMP half-powered
Date: 2001-07-05 14:51:35
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers

 Hello, hackers!

 I am running postgresql 7.1 on a SMP Linux box. It runs, but it never pass a 
loadavg of 0.4, no matter how I try to overload the system.

 The same configuration, the same executable, the same test on a non-SMP 
machine gives a loadavg of 19.

 That means that a Xeon SMP box with 1Gb of RAM goes slowlier than a weak 
CPU, with the same postgres, the same configuration, and the same test.

 Anybody knows what is happening? Is there something to do on a SMP machine 
for it to run? I tried with lots of shared memory, and with "commit_delay=0", 
but nothing worked.



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