Memory usage

Third and last problem for now…

The Teamwork server is consumming a large memory amount though we are working on a still small project (about 400KB). Moreover the data consumption is getting bigger from a commit operation to the other, while the project keeps slightly the same size (memory leaks ?).
Perhaps should I just change the command line parameters of the jvm (using the default settings of the scripts) ?

If someone could help, I will be very grateful as committing operations can takes several minutes after just a few hours working on it (hopefully the server is stopped every evening and restarted every morning).

Thanks by advance for any help,