The Oracle BI Administration Tool Session Manager is used in online mode to monitor activity. You can see which users are logged in, disconnect users, and terminate queries.The Session Manager shows all users logged in to the session, all current query requests for each user, and variables and their values for a selected session.
Additionally, an administrative user can disconnect any users and terminate any query requests with the Session Manager
The Session Manager manage the BI Server session and give your information about the server variable by session.
You can find it in the Administration tool. Open the Menu > Manage … > Session.
You can set it on 11g with the help of FMW Control > Business Intelligence > CoreApplication > Performance tab.