ICX: Session Timeout controls the time of inactivity of the session. If set to 30 minutes, then after no activity for 30 minutes you will get the popup window. This is for the Forms Session.
ICX:Limit Time controls the total time a session can be logged in. If set to 8 hours, then after 8 hours you will get the popup window regardless of what activity is being done. This is for the Forms Session.
ICX:Limit connect is a profile option determines the max number of connection requests a user can make in a single session. If a user sends more requests than the value specified by this profile option in a single session, then the session will expire. This needs to be bumped up to 2000 +, because each time Session Time is checked it adds another ICX connection. This IS NOT DETERMEND BY THE NUMBER OF USER CONNECTIONS. The more ICX checks its self the more ICX connections you are going to see for a user.
Session.timeout is set under the Apache's zone.properties. This should be set to default which is 1800000. Anything higher can result in performance and out of memory errors. Typically session.timeout and ICX:Session Timeout are set to the same value.
FORMS60_TIMEOUT = 5 Check .env for this. This is used to clean up and terminate the Forms Processes. The higher this variable is set, the longer the Forms processes will take to be cleaned up.
Heartbeat = 2 check $OA_HTML/bin/appsweb.cfg and or appsweb_<sid>_<host>.cfg. This is used to send a packet to the Server to indicate it is still active.