VM Telemetry Overview Window
See Also
The VM Telemetry Overview window displays smaller versions of the graphs that are presented in the
VM Telemetry window. The window displays high-level data on thread activity and
memory heap and garbage collection in the VM.
The VM Telemetry Overview window is typically located below the editing area and sharing the space with the
Output window
You open the VM Telemetry Overview window by choosing Window > Profiling > VM Telemetry Overview from the main menu.
The VM Telemetry Overview window contains three graphs displaying data on the following processes:
- Memory (Heap). The Memory (Heap) graph displays the total and used size.
These are the figures that a Java application can obtain using the java.lang.Runtime.totalMemory() and
java.lang.Runtime.freeMemory() calls.
- Memory (GC). The Memory (GC) graph displays the relative time spent in
garbage collection and the number of surviving generations.
- Threads (Statistics). The Threads graph displays the total
number of threads in the profiled application JVM. You can place your cursor over the
graph to display a tooltip with the current and maximum number of threads.
Notes.
- Relative time. Relative time is measured as a percentage of the total execution time that
the target JVM spends running garbage collection with all application threads
suspended.
- Surviving generations. Displays the number of different
ages for all objects allocated on the JVM heap since the moment the Profiler was
attached.
- Age of object. The age of the object is measured as the number of
garbage collections survived.
- See Also
- VM Telemetry Window
- Profiling Windows
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