1.2 Information on Memory

Heap Usage

Field

Explanation

Threshold

Heap size when next automatic garbage collection takes place. Gets recomputed after every garbage collection.

Size

Current heap size.

Active Size

Heap size after last garbage collection.

Displays the three values from above.

Heap Parameters

Field

Explanation

Minimal Size

Minimal heap size.

Maximal Size

Maximal allowed heap size. If the heap size exceeds this limit by a percentage of heap tolerance (see below) before garbage collection can take place, the user is prompted to increase the limit.

Free

Gives the percentage of free heap memory after garbage collection. For example, a value of $75$ means that the heap threshold is set to approximately: \mbox{Active Size} * 100/(100-75) that is: \mbox{Active Size} * 4.

Tolerance

Gives the percentage by which the system is allowed for purposes of better memory allocation to exceed the maximal heap size or to increase the heap threshold.

Garbage Collector

Field

Explanation

Active

Whether garbage collection is invoked automatically.


Christian Schulte
Version 1.0.1 (19990218)