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I want to see the details about "heap memory" and "off-heap memory". I have used jmap to see the heap memory usages, and I want to know the "off-heap memory" usages. I tried to use pamap pid command, but only can see the total memory used by the java process. And I want to see more details which are using the off-heap memory.

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    see http://stackoverflow.com/questions/20058489/is-there-a-way-to-measure-direct-memory-usage-in-java – kofemann Apr 26 '17 at 06:56

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