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I'm totally new to VisualVM.
Is there a way to automatically start CPU profiling? My issue is that I start a program from Eclipse which runs for approx. 20 seconds. By the time I can open up the tab and click on CPU profiling, the app has almost finished processing.
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Self Time: total time spent invoking this method. If a method was called twice, the self-time will be the sum of the time spent in each call excluding internal method calls. Self Time (CPU): the same as Self Time except that only CPU execution time is considered, omitting I/O operations.
Java VisualVM enables you to take profiler snapshots to capture the results of a profiling session. A profiler snapshot captures the results at the moment the snapshot is taken. To take a snapshot, click the Take Snapshot of Collected Results button in the toolbar while a profiling session is in progress.
On a Windows system, start VisualVM by double-clicking jvisualvm.exe. You can also select VisualVM from the Start menu (if Windchill shortcuts are installed). On other systems, start VisualVM by invoking the jvisualvm script. You can also use the wt.
Under the Local node in the Applications window, right-click the application node and choose Open to open the application tab. Click the Profiler tab in the application tab. Click Memory or CPU in the Profiler tab. When you choose a profiling task, VisualVM displays the profiling data in the Profiler tab.
I don't know how to automatically start profiling but I have a workaround.
You can set a breakpoint at the start of your program's main and start the program from Eclipse in debug mode. After beginning to profile in VisualVM resume your program in Eclipse.
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