Documentation for Administrators

Monitoring

This area shows information about the current Java VM memory utilization.

This menu level is only available to server administrators.

Name:description of the memory pool shown.

Code Cache: memory pool used for the internal evaluation for processes such as compiling.
Eden Space: memory pool where most objects are initially generated. As soon as the garbage collector (GC) clears the Eden space, the surviving objects are transferred to the survivor space.
Survivor Space: memory pool where the transient objects from the Eden space were transferred after GC (garbage collection).
Tenured Gen: memory pool for persistent objects that have existed for some time in the survivor space and have been transferred here.
Perm Gen: memory pool for JVM objects that are permanently required.
Total: no memory pool. Provides a general overview of all pools available.

Type: type of memory (HEAP || NON_HEAP).

Max: maximum amount of memory available (in bytes) for memory management.

Used: memory currently in use (in bytes).

Initial: initial, allocated memory (in bytes) when JVM is started.

Committed: guaranteed available memory (in bytes) for JVM.

In addition to the table overview in the top part of the window, a graphic representation is available for each memory pool.