Re: Questions about GIL and web services from a n00b

From	sturlamolden <sturlamolden@yahoo.no>
Newsgroups	comp.lang.python
Subject	Re: Questions about GIL and web services from a n00b
Date	2011-04-17 07:48 -0700
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On Apr 16, 4:59 am, David Cournapeau <courn...@gmail.com> wrote:

> My experience is that if you are CPU bound, asynchronous programming
> in python can be  more a curse than a blessing, mostly because the
> need to insert "scheduling points" at the right points to avoid
> blocking and because profiling becomes that much harder in something
> like twisted.

I think Raymond's argument was that multi-threaded server design does
not scale well in any language. There is a reason that Windows I/O
completion ports use a pool of worker threads, and not one thread per
asynchronous I/O request. A multi-threaded design for a webservice
will hit the wall from inscalability long before CPU saturation
becomes an issue.

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Re: Questions about GIL and web services from a n00b Chris H <chris.humphres@windsorcircle.com> - 2011-04-15 13:09 -0400
  Re: Questions about GIL and web services from a n00b Raymond Hettinger <python@rcn.com> - 2011-04-15 18:05 -0700
    Re: Questions about GIL and web services from a n00b David Cournapeau <cournape@gmail.com> - 2011-04-16 11:59 +0900
      Re: Questions about GIL and web services from a n00b sturlamolden <sturlamolden@yahoo.no> - 2011-04-17 07:48 -0700
    Re: Questions about GIL and web services from a n00b aahz@pythoncraft.com (Aahz) - 2011-04-16 07:44 -0700
      Re: Questions about GIL and web services from a n00b Chris Angelico <rosuav@gmail.com> - 2011-04-17 02:04 +1000
      Re: Questions about GIL and web services from a n00b Jean-Paul Calderone <calderone.jeanpaul@gmail.com> - 2011-04-16 13:53 -0700
        Re: Questions about GIL and web services from a n00b Michael Torrie <torriem@gmail.com> - 2011-04-16 16:10 -0600
          Re: Questions about GIL and web services from a n00b sturlamolden <sturlamolden@yahoo.no> - 2011-04-17 07:50 -0700

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