Use this task to enable automated heap dump generation. This function is not supported when using a Sun Java virtual machine (JVM) which includes WebSphere Application Server running on HP-UX and Solaris operating systems. You need to research taking heap dumps on Sun JVMs or call IBM Support.
The automated heap dump generation
support, which is available only on IBM Software Development Kit and analyzes
memory leak problems on AIX, Linux, and Windows operating systems.
Manually
generating heap dumps at appropriate times might be difficult. To help you
analyze memory leak problems when memory leak detection occurs, some automated
heap dump generation support is available. This functionality is available
only for IBM Software Development Kit on AIX, Linux, and Windows operating
systems.
Most memory leak analysis tools perform some
forms of difference evaluation on two heap dumps. Upon detection of a suspicious
memory situation, two heap dumps are automatically generated at appropriate
times. The general idea is to take an initial heap dump as soon as problem
detection occurs. Monitor the memory usage and take another heap dump when
you determine that enough memory is leaked, so that you can compare the heap
dumps to find the source of the leak.
To help you
analyze memory leak problems when memory leak detection occurs, some automated
heap dump generation support is available.
To enable
automated heap dump generation support, perform the following steps in the
administrative console:
Important: To preserve disk space, the Runtime Performance Advisor does not take
heap dumps if more than 10 heap dumps already exist in the WebSphere Application
Server home directory. Depending on the size of the heap and the workload
on the application server, taking a heap dump might be quite expensive and
might temporarily affect system performance.
The
automatic heap dump generation process dynamically reacts to various memory
conditions and generates dumps only when it is needed. When the heap memory
is too low, the heap dumps cannot be taken or the heap dump generation cannot
be complete.
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