How to capture Heap Dumps with AppDynamics?

Question

How can we capture heap dumps with the help of appdynamics?

score 8 · Answer 1 · answered Jul 14 '15 at 06:12

Heap dumps in appdynamics can be taken for JRockit JVM by the below method(Note : This does not work for IBM JVM)

Select you node in appdynamics for which the heap dump has to be taken.
Select the tab "JMX"
Go to "MBean Browser"
Go to "com.sun.management" >> "HotSpotDiagnostic" from the left pane
On the right window under operations for dumpHeap click on the thunderbolt sign to invoke action.
A new dialogue box opens up in which you have to fill the p0 and p1 text boxes as follows

p0 – Path to generate heap dump(/path/dump.hprof)

p1 - True – GC before Heap dump ; False - No GC before heap dump

Click on "invoke"

Note : If you want heap dump to be generated in the case of out of memory give

p0 : HeapDumpOnOutOfMemoryError

Also note that these values will be lost on JVM restart.

score 1 · Accepted Answer · answered May 18 '15 at 02:39

From what I understand from their documentation, AppD do not have a way to capture heap dumps. They suggest using Memory Leak detection feature in such scenarios. On a different note, I know we can get thread dumps which maybe helpful in some cases (Agents -> Request Agent Log Files)

How to capture Heap Dumps with AppDynamics?

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