[Zope] Counting threads

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? -- Peter Bengtsson, work www.fry-it.com home www.peterbe.com hobby www.issuetrackerproduct.com