John, The simple and intuitive solution that Hansen provided can be used to log when an HttpSession instance is GC'd since the objects that instance holds *unique* references to will also be GC'd.
So, the question becomes, which classes are holding references to HttpSession objects and preventing them from being GC'd? We used a tool years ago to analyze the heap when we were tracking down some elusive memory issues. Heap Analysis Tool: <https://hat.dev.java.net/> -Bob --- John Powers <[EMAIL PROTECTED]> wrote: > thats not what i'm talking about. > > after a session times out... tomcat removes it from > its list of sessions. a session listener will show > that it leaves. > > however, a GC then needs to see if its available for > collection on the next go around of the GC. if i > force the GC, or whenever it decides to happen, my > objects under the session aren't being collected. > > so then. how can you know when the session itself > is collected (not timed out) > > > > -----Original Message----- > From: Farrow, Marc [mailto:[EMAIL PROTECTED] > Sent: Fri 3/31/2006 5:36 PM > To: Tomcat Users List > Subject: RE: session GC > > easiest way to make sure they are GC'd is to set > session time-outs. > > -----Original Message----- > From: John Powers [mailto:[EMAIL PROTECTED] > Sent: Friday, March 31, 2006 6:07 PM > To: Tomcat Users List > Subject: session GC > > > How do you know when a session is garbage collected? > You can write a sessionlistener for when it gets > deleted out of tomcat, > but after that, when do you know if its garbage > collected? > > I currently do not think my sessions are being > collected. Within a day > 500M of memory get eaten up and I can't collect them > manually even. So > I want to know when/if the sessions are being > collected. > > If I wrote a subclass to httpsession, how could get > tomcat to use it? __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
