Re: [Py2exe-users] FD_SETSIZE

[Thomas H. <th...@ct...>]

Ronnie schrieb:
> Hello,
> I am running an python IRC server using py2exe and am running into a problem
> with maximum connections (approx 1970).
> 
> The following is displayed:
> 
> Exception in thread Thread-1957:
> Traceback (most recent call last):
>   File "threading.pyc", line 486, in __bootstrap_inner
>   File "threading.pyc", line 663, in run
>   File "threading.pyc", line 440, in start
> error: can't start new thread
> 
> 
> I assumed this might be a RAM issue (1GB on my current machine), and ran the
> same script on a much more powerful server (4GB) and had the same results,
> so it cannot be that.
> 
> When I run the python script itself (not via py2exe) it only allows approx
> 1015-1020 connections, so using py2exe alone almost doubles the limit. Can
> anyone offer some information as to why this is, and how I can further
> increase the limit.
> 
> After googling around it appears that in order to allow more connections per
> process I need to raise my FD limit, is this true (and how can I do it using
> py2exe).
> 
> My platform is Windows XP.

I *think* that each thread has a stack space (on WinXP) of around 1MB.  So you
may be reaching the virtual address space limit of 2GB.

This limit does not depend on the physical memory available afaik.

I have no idea why the Python script allows less threads.

Thomas