It appears the way to control it would for Apache or Zope to return "503 Service Unavailable" when the load is too high, but we haven't found a good way to do this; Zope doesn't appear to have any mechanism for it, and Apache's ProxyPass doesn't either. I guess load balancers would, but that's a bit overkill since we run the server on one machine.
Hi, I'm very interested in your resutsl. We have exaclty the same situation, though we have not analysed it further - the only thing that saves us is to restart zope.
re: load balancing: there is Pound - http://www.apsis.ch/pound/ - that might serve as a loadbalancer between processes in a single machine.
Maybe that will help a bit, though it doesn't really resolve the issue with zope choking; if it works, it will merely circumvent it.
hth,
/dario
-- -- ------------------------------------------------------------------- Dario Lopez-Kästen, IT Systems & Services Chalmers University of Tech.
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