Tracking down a memory leak

[Kip Macy]

I have a long running python program that typically uses 6-7MB. It can 
happily run for days without any problems, but periodically it will balloon
and use up all available memory and swap. I'm aware that the presence of
circular reference can defeat garbage collection. Are there any recommended
utilities or methods for determining what data structures are using up all
available memory?

Thanks.

		-Kip