[Twisted-Python] Threadpool analysis?

[Jonathan Vanasco]

My threadpool on a webspider keeps locking up.  I've been using  
manhole and sys._current_frames to try and figure out whats going  
wrong -- and i've fixed a few issues.

I'm wondering though if anyone has developed some sort of threadpool  
analysis plugin -- something that monitors when threads check in/ out  
- maybe store stuff using rrd.

Also I'm wondering if there's a good /idiomatic way to mark/monitor  
threads -- I want to monitor certain stuff that I call defer to  
thread on,  I don't really care about other  stuff in the threadpool.

Thanks.

// Jonathan Vanasco

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