[Twisted-web] Non-Blocking I/O?

[darren at ontrenet.com]

Hi,
  I currently use Twisted Web as a WSGI container for my Flask 
application.
I'm trying to get good concurrent user requests but running into some 
hiccups.

I see that for each user session that hits my server, twistd creates an 
OS thread. This of course will not scale will with concurrent users.

Is there a better way or perhaps command parameter I can use to support 
concurrent users with something like non-blocking IO which can handle 
thousands of concurrent users.

thanks!
Darren