[Zope] debugging zope?

Hi, I'm running zope 2.1.6 on Linux with DCoracle on "production", and about once in week zope runs out of control, like it would be in a infinite loop. Stops responding to zserver requests. Any hints on how to find out what's going on? -- Riku Voipio riku.voipio@tietoenator.com 09-862 60764