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How to use Java built-in profiler.

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Question:Can you give good examples on using of Java built-in profiler?

Answer: Yes, read below...

One of the features of Java is automatic allocation and deallocation of memory as objects are created and then no longer referenced. Applications that have a lot of object creation and especial creation of very large objects can stress this process of memory management called garbage collection (GC), and thus can cause the application to perform poorly.

This do*****ent is meant to help you use the -Xrunhprof command to find which objects are filling up the heap and what classes are calling them.

The -Xrunhprof flag

Built into all Java is the hprof tools that allow tracing and profiling information to be output to a file. From a heap debugging standpoint, this tool can provide some basic information, that is fairly easy to interpret. There are two basic functions that can be profiled, one is the live SITES, and the other is to DUMP the entire heap. Each of these then has information that points to a java trace of the object allocation.

The whole 4-pages aryicle you can read here...


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