sfDoctrineGuardPlugin - timeout logout

i use Symfony 1.4 + sfDoctrineGuardUser. I have timeout set. This working good. User is logout, but SESSION for user isn't clear. Where i can this 开发者_Go百科set?

additionally i would like without refresh the page, for example every 15 minutes check value in database and send new query to DB.

why would you clear the whole session? the session isn't only used for the login; there are other things like the current language and so on stored…

the check for new values in the DB you can easily achieve with jquery (timers and $.ajax)