You have a Catalyst application that is consuming more and more memory over time. You would like to find out what classes are involved and where you may have cyclic references. Why not try out nothingmuch's handy dandy Catalyst::Controller::LeakTracker.
Transactions are an important feature of many database management systems. Transactions allow one to make changes to a data store in a reliable way that can gracefully handle failure. In short you are guaranteed that the changes take place in their entirety or not at all. In addition, transactions provide isolation for concurrent transactions to avoid data from being changed out from under you. This petit article demonstrates transactions using DBIx::Class, a kickass ORM for Perl.
