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.

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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)