When I boot my 7520, there is approximately 15MB of free memory. After use, it goes down to 9-10MB. Once I reset the system (pull battery), it goes back up to 15MB. Has anyone else experienced this, and more importantly, why is this happending from a technical perspective.

p.s. Yes, I have cleared the logs and browser cache however the only way to reclaim the 5MB of "lost" memory is to pull the battery.

It's memory used with all your open applications.
once you open messages, address book, tasks, those programs remain open, and utlize memory space.
one other way to see it, reboot, hold alt and hit your clear/back button. scroll along the button bar, and you'll see the basic operating programs.
then, open all of your applications and close them, hold alt and hit your clear/back button. scroll along the button bar, and you'll see all of your applications listed.

Wirelessly posted (Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0) BlackBerry7520/4.1.0 Profile/MIDP-2.0 Configuration/CLDC-1.1 VendorID/103)

Does the address book amnd task list use extra memory when they are opened, e.g. For indices?

The OS is running java, memory goes down when applications are using them and will go up after a while when the unused memory is garbage collected.

P

In other words - this appears to be normal behavior. The more applications you open, the more memory is consumed.

sounds just like my old mpx220.

Exactly the same except the BlackBerry works

At what point does garbage collection start? I have dropped from 15MB to 9MB, then performance degrades. Is there a secret sequence of keys I can do manually to start garbage collection???

Is there an equivalent to windows' task manager applet that lists open processes/programs and allows you to force them to close? Other than hitting alt + close...