Can some on advise how to best set the Session Expiration parameter in the General Setting section? I have read some previous posting and still clueless.

1. How is the non-custom setting work?
2. Is there any custom setting other than the xoops_session to down load and try out?
3. Is there any documentaion about what the xoops_session do? I saw so many varieties of values like some one use the 480 vs 1000 min?
4. I checked "who is on line" section and found that if you close the browser while in a session, that login will stay up for a LONG time and I am using the value of 10. How much time will it stay up? I have not a clue.