[Twisted-Python] CPU choice for big twisted server.

[Andy Gayton]

Alec Matusis wrote:
> I am running a poll reactor with Twisted 2.2 on 2.6.11 kernel.
> "top" currently shows 80-90% CPU utilization for this twistd process.
> We have not switched to epoll Twisted 2.5 yet, although we are planning to.

Being async, a twisted server can only make use of a single processor. 
With dual core chips, it can only use one of the cores.

No matter what hardware you throw at it, you'll eventually max out that 
core.

If you're planning to scale out a lot more, you'll want to structure 
things so you can load balance several (1 process per core) twisted 
processes running the service.

cheers,
Andy.