onbar catalog files slowly filling up

Need some info if anyone has run into this before. Presently we have three onbar catalog tables growing steadily: bar_object, bar_action, bar_instance. Informix has no policy regarding the growth of these tables. Now, we really only need to keep 3 months worth of information here. Just curious if anyone has truncated these tables, and seen any side effects, or if anyone has a methodology for doing this that is safe. Thanks, Richard Sent via Deja.com http://www.deja.com/ Before you buy.