[Zope] Win2k Processor Affinity
Jim Washington
jwashin at vt.edu
Wed Feb 4 08:22:32 EST 2004
Answering my own question after experimenting :)
> My production machine is a dual-processor machine running Windows 2000
> Server with zope running as a service.
> I understand from previous posts that setting processor affinity,
> i.e., making python/zope run on only one of the processors, may be a
> good thing. Since this is my production machine, I would rather not
> experiment too much.
>
> What I have is the imagecfg.exe program from
> http://www.robpol86.com/tutorials/imagecfg.php, and the instructions
> are to run
>
> imagecfg -u file.exe
> imagecfg -a 0x1 file.exe
>
> on the executable file I would wish to set affinity to processor 1 on.
>
> I see that in Task Manager, I cannot set processor affinity manually
> on my python process. I get "access denied."
>
> I am running what I presume is the stock win32 install of zope-2.6.2.
> It began as 2.6.0, but has been upgraded.
>
> So, now for the question:
>
> Has anyone done this?
Yes.
> Is the above procedure the correct way to do this?
Yes. Even though I could not set processor affinity manually through
task manager.
> Which executable(s) should be imagecfg'd? Is it the python.exe in
> [zope]/bin? Or the .exe that starts the service? or a .dll or two?
>
It's the python.exe in [zope]/bin . I made a renamed backup copy of it
just in case of failure.
Results:
It works. I stopped Zope in the service manager, did the above, and
then started Zope again. It took a total of about two minutes. I have
not done any special performance testing, but visually in the task
manager, zope is indeed running on a single processor, and my "zen" is
that it seems a bit peppier. It's been running fine in this state for a
few days now.
This of course allows a proper future experiment with ZEO --> server on
one processor, client on the other.
--Jim Washington
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