Michael Adler wrote:

On Thu, Oct 07, 2004 at 11:48:41AM -0400, Bill Montgomery wrote:

Alan Stange wrote:

The same test on a Dell PowerEdge 1750, Dual Xeon 3.2 GHz, 512k cache, HT on, Linux 2.4.21-20.ELsmp (RHEL 3), 4GB memory, pg 7.4.5:

Far less performance that the Dual Opterons with a low number of clients, but the gap narrows as the number of clients goes up. Anyone smarter than me care to explain?

You'll have to wait for someone smarter than you, but I will posit this: Did you use a tmpfs filesystem like Alan? You didn't mention either way. Alan did that as an attempt remove IO as a variable.


Yes, I should have been more explicit. My goal was to replicate his experiment as closely as possible in my environment, so I did run my postgres data directory on a tmpfs.

-Bill Montgomery

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