A lot of possibilities. You will need to stop TS to cycle the access log.Check your OD folders. Also in the TeamSite/local/logs/iwui folder as well as ApplicationContainer/server/default/logs Most of those are cycled so there will be a lot of medium sized files. Finally run TOP before you turn of TS. See what is consuming memory, likely that will be iw.server, but there may be a rogue java process or three. There are memory leaks out there, in Java and in TS.