28-Sep-2015
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This is a nice trick I learned over the past week while doing JVM heap analysis. You can use JConsole to take a heap dump of your
JVM. Open the
MBeans tab and navigate to
com.sun.management, then
HotSpotDiagnosticMXBean. This will display all the methods that can be invoked on this bean. We're interested in the
dumpHeap method.
The
JDK documentation describes this method as:
So the first parameter is the file name to write the heap dump to and the second controls whether all objects or just the live objects are to be dumped. If you specify
false, it will include all objects that are not reachable and are waiting to be garbage collected, otherwise it will only include just the reachable objects.
-i
A quick disclaimer...
Although I put in a great effort into researching all the topics I cover, mistakes can happen.
If you spot something out of place, please do let me know.
All content and opinions expressed on this Blog are my own and do not represent the opinions of my employer (Oracle).
Use of any information contained in this blog post/article is subject to
this disclaimer.
Igor Kromin
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