Question about sessions

I have a mysql/php db/website that uses session, (i am new to sessions). My question is that the session works and all but i notice that it writes alot of sess_*************** files in the /tmp directory. Do i need to purge these weekly so it wont use tooo much room or are these spose to delete them selves.? Maybe someone has come accross this before and fixed it? ------------------------------------------------------------------------

                Chris Kay - Tech Support - IDEAL Internet

email: chriskay@ideal.net.au phone: +61 2 4628 8888 fax: +61 2 4628 8890 ------------------------------------------------------------------------