My understanding on this topic is perhaps not clearest, but here's what I've been able to glean from watching tomcat-user (amongst others).
The VM will not 'release' back to the OS, any memory it grabs during the run of a program. But that doesn't mean that it is currently "in use". ex: You've set the vm to start with 125MB memory, with a max size of 256MB. During normal operations, the vm is at 124.99 MB and then someone new logs in. That forces the VM to increase the memory being used (and reported to the OS), possibly all the way to 256MB. Now it's overnight. No one is using the app. Sessions expire, and are garbage collected. The size of the memory "in use" has gone done, but the memory "in use" as reported to the OS is still 256MB. I'm sure someone will correct that if it's fundamentally wrong in the slightest aspect. ;) > -----Original Message----- > From: Jerald Powel [mailto:[EMAIL PROTECTED] > Sent: Monday, March 08, 2004 4:38 PM > To: Tomcat Users List > Subject: <session-timeout> > > > > Hi all, > > I am experiencing problems with memory management. I > load up my app in 10 or 15 browsers where various stuff is > put on a session each time. In Windows Task Manager I can see > java.exe incrementing by an amount of memory for each > browser/app opened. No problem there. In my web.xml I define > <session-timeout> to be 2 minutes. Why after an inactive > period of time exceeding 2 minutes, does the memory being > used not appear to lessen please? In fact, even I close all > browsers the memory being consumed remains at its > peak...until a server restart is necessary. > > thanks for your input > > G. > > > --------------------------------- > Yahoo! Messenger - Communicate instantly..."Ping" your > friends today! Download Messenger Now > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
