I observed that during my /tmp directory you will find many session files. One customer creates many (5-10-20) session files, but really just uses one (it really works fine). I believed that adsense iframes generate session files around the server that aren't used. Basically remove adsense I recieve normal one session per customer.
Any ideas the way i can eliminate the adsense produced session files? I could not find any hint the appear. Server is Light, but same on WAMP.