VM Telemetry Window
See Also
The VM Telemetry window displays high-level data on thread activity and
memory heap and garbage collection in the VM.
The VM Telemetry window typically opens in the editor area.
You open the VM Telemetry window by choosing Window > Profiling > VM Telemetry from the main menu.
Alternatively, you can click the VM Telemetry button (
) in the Profiler window.
The following table displays the buttons in the VM Telemetry window toolbar.
Button |
Function |
 | Export. Click to export the results as a text file. |
 | Save Current View. Click to save the results as a .png image file. |
 | Zoom In. Click to increase the detail of the graph. |
 | Zoom Out. Click to decreases the detail of the graph. |
 | Scale To Fit. Click to toggle between a scalable view and a fixed-scale view. |
The VM Telemetry window contains three tabs with graphs displaying data on the following processes:
- Threads / Loaded Classes. 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 information about the current and maximum number of threads.
- 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. You can place your cursor over the graph to view more detailed information
about memory usage at that point in time.
- Memory (GC). The Memory (GC) graph displays the relative time spent in
garbage collection and the number of surviving generations.You can place your cursor over the graph to view more detailed information
about garbage collection statistics at that point in time.
- See Also
- Profiling Windows
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