[Zope] system requirements

[Matt Hamilton]

On Tue, 4 Jun 2002, Matthew T. Kromer wrote:

> All Python data structures are protected by this singular lock.  Locking
> is thus very coarse grained, but fairly efficient -- were every data
> structure to have its own lock, the overhead of locking would become
> prohibitive.
>
> Every action within the interpreter with a few very rare exceptions
> requires the GIL to be held by the invoking thread.

Matt,
  OK, thanks for the info -- I suspected this were the case.  We have been
doing a few tests with python/Zope on multi-processor machines (Sun boxes
mainly).  One question that continually gets asked is: "How does Java
handle this?".  Since Sun tout java so much, you would expect them to have
solved most of the issues of scalability of java on their own hardware.
So from this I am guessing that Java has a finer-grained locking model.
Any ideas?

-Matt

-- 
Matt Hamilton                                         matth@netsight.co.uk
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