[issue5092] weird memory usage in multiprocessing module

Martin v. Löwis report at bugs.python.org
Thu Jan 29 20:18:39 CET 2009


Martin v. Löwis <martin at v.loewis.de> added the comment:

> I still do not understand what is going on when python executed thic 
> code. I have a local variable l in my parent process. 

No, you don't. It's a global variable, not a local one.

> When I create a 
> child process, program makes first makes a copy of memory. Than what?

It doesn't have to do anything with the multiprocessing at all.
For comparison, just run the Python script

def f():
  del l
l = []
f()

It produces the same error, with no multiprocessing involved.

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<http://bugs.python.org/issue5092>
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