> Sorry; that meant the "set of data acually live (i.e., not garbage) in > the heap". In other words, the amount of memory truly "used".
And to clarify further this is not the same as the 'used' reported by GC statistics, except as printed after a CMS concurrent mark/sweep has completed (and even then the number is not exact due to changes made during the concurrent mark/sweep phase). That's why I said "live" (a term often used in the context of GC; an object which is "live" is one which is reachable by the application and thus by definition not eligible for garbage collection). -- / Peter Schuller
