-----Original Message----- From: Tony McDonald [mailto:tony.mcdonald@ncl.ac.uk] Sent: Tuesday, November 23, 1999 4:37 AM To: Zope List Subject: [Zope] Global Interpreter Lock and four processors...

Hi all, We have a four processor Sun box (each processor scores about 2400 pystones, whereas a 500 MHz P3 gets about 5400 pystones).

I have three zope installations running, one of which is hosting three subsites. If I create four *binary* installations of Zope (complete with the thread-safe MySQL adaptor and all the other python libraries necessary to run a Zope site), will I run into the global interpreter lock?

You *allways* run into the interpreter lock. (*Nobody* expects the spanish inquisition!)

What I'm saying is if I *don't* use /usr/local/bin/python for my Zope installations, but instead rely on ZOPE_HOME/bin/python, will I be able to spread my Zope sites out over the four processors, or is there a nasty sting in the tail in doing this?

Depends on the OS. some OSes will tend to prefer one process to one processor, and associate a cost with moving processes between processors, but threading may throw a wrench in that whole plan. Perhaps there is a a Solaris command to bind a process to one specific processor? -Michel