Java FAQ: Top Questions

67. What is the Heap Dump and how is it analyzed?

A heap dump is a snapshot of the JVM’s heap memory, capturing all objects, classes, and references, used to diagnose memory leaks or high memory usage.

Generation: Via jmap , -XX:+HeapDumpOnOutOfMemoryError , or VisualVM.
Format: Typically HPROF binary format.
Analysis: Tools like Eclipse MAT, JVisualVM, or YourKit identify dominator trees, leak suspects.
Use Case: Finding memory leaks or optimizing memory usage.

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