On Thu, 17 Apr 2008, Jeffrey Baker wrote:
On Thu, Apr 17, 2008 at 12:58 AM, Greg Smith <[EMAIL PROTECTED]> wrote:
So in the case of this simple benchmark, I see an enormous performance
regression from the newest Linux kernel compared to a much older one.
This has been discussed recently on linux-kernel. It's definitely a
regression. Instead of getting a nice, flat overload behavior when
the # of busy threads exceeds the number of CPUs, you get the
declining performance you noted.
Poor PostgreSQL scaling on Linux 2.6.25-rc5 (vs 2.6.22)
http://marc.info/?l=linux-kernel&m=120521826111587&w=2
The last message in the thread says that 2.6.25-rc6 has the problem
nailed. That was a month ago. So I guess, upgrade to 2.6.25, which was
released today.
Matthew
--
"Prove to thyself that all circuits that radiateth and upon which thou worketh
are grounded, lest they lift thee to high-frequency potential and cause thee
to radiate also. " -- The Ten Commandments of Electronics
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