maximum number of threads

Jeremy Sanders jeremy+complangpython at
Wed Jan 10 17:13:12 CET 2007

Jean-Paul Calderone wrote:

> Indeed you are correct.  The actual limit you are hitting is the size
> of your address space.  Each thread is allocated 8MB of stack.  382
> threads consumes about 3GB of address space.  Even though most of this
> memory isn't actually allocated, the address space is still used up.  So,
> when you try to create the 383rd thread, the kernel can't find anyplace
> to put its stack.  So you can't create it.

Interesting. That's why I can get over 3000 on my x86-64 machine... Much
more address space.

Jeremy Sanders

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