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Editorial Team
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Asked: 2026-05-27T17:44:12+00:00

What does a Profiler do exactly? I ran the JProbe profiler on my Java

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What does a Profiler do exactly?

I ran the JProbe profiler on my Java EE Application.
For now I selected Performance Analysis only. When I investigated the code, it showed how many times each method gets called and how much time it took. It gave me a clear view of these things.

Now my question is, what in general does a profiler do exactly? The only thing it seems to do is showing how many times a method is called and how much time each method took?

Does Profiling a Java EE application indeed only means this thing? (In the concern of Performance Analyses only)

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1 Answer

  1. Editorial Team

    A profiler can tell you lots of useful things, in addition to traces and method timings:

    • The state of the heap and its generations in real time: perm, eden, etc.
    • Created threads and their states
    • CPU usage
    • Number of instances of each class

    I like to use Visual VM 1.3.3 with all the plugins installed. I use the Oracle/Sun JVMs, so it works for me.

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