Session data files

Hey, folks --- Just something I'm curious about: When I run PHP on my development box (W2K), I just get one session file per connection which gets deleted (usually) after the session expires. When I look at the session files on the client server (linux/apache), there seems to be one session file per page click. I needed to clear them a few minutes ago, and there are already 80+ files, and this is just from one user (a tester -- this is in late-late-late beta). Now, there is nothing wrong -- everything is working fine -- I am just curious if Apache does this differently, or if there is a configuration setting that governs this (I haven't found -- but only did a cursory look). Anybody willing to take the time to enlighten me? Thank you, Ken