What are the Java performance analysis tools?

VisualVM

VisualVM is a resource analysis tool that has been updated from JDK 6 to 7. It defaults to memory and CPU monitoring. It can tell you which classes and methods consume resources, but it doesn't show the code flow.

JProfiler

JProfiler is easy to install, and through a wizard, you can select the application server to run the application on. I had to choose to use the home directory of the JPofiler application server, and a separate startup script generated by the wizard. Then run the server. During the listening session, it provides several options. It can record memory usage and CPU usage. While viewing the CPU usage, you can see the execution path. This lets me see that the application spends most of its time on requests. We can install the IntelliJ plug-in to the IDE, so it will be more convenient to run JProfiler. For example, you can directly help me start Tomcat.

YourKit

YourKit is a performance analysis tool that I stumbled upon while working on another project. Its installation is simple. There is an option during installation to install a plug-in to my IDE. Once installed, run the app, use the plugin, and it will automatically connect to YourKit. It has a beautiful user interface to view memory and CPU monitoring, and you can also see the execution path of the request.

JProbe

I had some difficulty when I first started creating JProbe. The installation wasn't straight forward, I needed to configure it. It uses the same settings as JProfiler. It will generate startup scripts in your Tomcat directory. It is possible to start the server and listen for sessions through a script. Its interface contains buttons and tables, where memory usage can be seen, but execution paths within the process cannot be found.

Spring Insight

I heard that TC Server has a Spring Insight monitoring interface, so I tried it excitedly. After the installation is complete, set it to the developer version of TC Server, and then deploy the application on the TC Server. I looked at the Insight interface, which does a good job of monitoring classes and methods and seeing how much time it took to complete the method. I can also see the input parameter values, as well as the return value. Since my application is based on Spring, Spring Insight is able to provide very useful data. The configuration of the TC Server plug-in on the IDE is similar to that of Tomcat. The SpringSource tool suite comes with Spring Insight.

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