This panel shows the cumulative amount of storage for new obects requested by the application for time. Since the rate at which an application creates new objects is often an indicator of its performance, changes in the slope of this curve may indicate opportunities for tuning garbage collection. To visualize incremental changes in object creation rate more dramatically, see the Creation Rate panel.
Note that the cumulative storage depicted in this panel does not represent the amount of virtual or physical memory allocated to your application. That's because storage recovered by the garbage collector for unused objects is not deducted from the cumulative amount. The purpose of this panel is to indicate overall application progress.