Thanks for the all replies! I do not directly cache DAL objects, but yes, caching may be behind the leak through some references between objects. Maybe I'll examine it with objgraph, and I agree, it would be nice to have the function at hand in the admin interface.
Cherrypy & anyserver brings no significant change. With Cherokee & uWSGI the problem has gone. Moreover the new setup is subjectively faster to the previous one (Rocket behind Apache proxy). :) David
