Set different Session Timeout for guest

[basketmen]

In table session, using phpmyadmin, i see too many rows, it can be highload, current Session timeout is still Default : 900

i want to change Session timeout for guest : 600
but for member still : 900


is there a way to do that?




if needed a plugin, is this will working? :

Product : vbulletin
Hook Location : global_start
Title : different Session Timeout for guest
Execution Order : 1
Plugin PHP Code :

and let empty admincp > vboptions > Cookies and http header options > Session timeout






really please share your experience, i want to try it