How to check memory utilization by java program?

Question

Is there any native java code to check the memory utilized by the program, or the only way possible is to check memory utilized by the JVM itlself?
can this be done purely in java or we need external process to fulfill this job?

possible duplicate of Using Java to get OS-level system information — Greg Hewgill
– Greg Hewgill, Commented Dec 23, 2010 at 21:48

Art Licis · Accepted Answer · 2010-12-23 21:51:04Z

3

I think JConsole would be a good start.

answered Dec 23, 2010 at 21:51

Art Licis

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OrangeDog · Accepted Answer · 2010-12-23 21:55:05Z

1

You could use java.lang.management.MemoryUsage, or the external tool, VisualVM (shipped with JDK).

answered Dec 23, 2010 at 21:55

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malaverdiere · Accepted Answer · 2011-05-09 12:33:46Z

1

I personally find java.lang.management.MemoryMXBean to be simpler to use than MemoryUsage. You can get the memory used by the program as follows:

MemoryMXBean memoryBean = ManagementFactory.getMemoryMXBean();
long heapMemUsed = memoryBean.getHeapMemoryUsage().getUsed();
long otherMemUsed = memoryBean.getNonHeapMemoryUsage().getUsed();
long totalMemoryUsed = heapMemUsed + otherMemUsed;

answered May 9, 2011 at 12:33

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QuantumRob · Accepted Answer · 2010-12-23 21:49:50Z

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Is there something that jConsole can't provide? That shows Heap, Classes, Threads, CPU and a heck of a lot more.

answered Dec 23, 2010 at 21:49

QuantumRob

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