[Zope] Counting threads

[Jens Vagelpohl]

On Jan 22, 2008, at 16:23 , Peter Bengtsson wrote:

> Perhaps I'm wrong but I suspect that a Zope I'm running is dying  
> because of running out of threads. They probably die when being  
> designated to open an external relational database connection or  
> something dodgy.
>
> What are my options for monitoring and debugging what zope's threads  
> are doing?
> Is there a simple tool to just get a simple readout of how many  
> threads are busy?

One simple option is the ZMI Control_Panel Debug screen. Go to / 
Control_Panel/DebugInfo/manage_main on your instance and scroll to the  
bottom. It shows current connections to the Zope server from the  
outside, and how long the connection has been around. You will always  
at least see one entry, which is the request to fetch that debug  
screen. If you have connections beyond a few seconds of age they may  
be stuck.

jens