Native memory perspective

The native memory perspective provides information about the native memory usage of the process and system being monitored.

Note: This version of Health Center does not provide a native memory perspective view for the z/OS® 31-bit or z/OS 64-bit platforms.
Native memory is the memory provided to the Java™ process by the operating system. The memory is used for heap storage and other purposes. The native memory information available in the native memory perspective view varies by platform but typically includes the following:
Table 1. Memory information values
Name Description
Free Physical Memory The amount of physical memory (RAM) free on the monitored system.
Process Physical Memory The amount of physical memory (RAM) currently in use by the monitored process. On some platforms, this memory is called "resident storage" or the "working set".
Process Private Memory The amount of memory used exclusively by the monitored process. This memory is not shared with other processes on the system.
Process Virtual Memory Total process address space used.
More detailed discussions on understanding native memory usage can be found in two developerWorks® articles:http://www.ibm.com/developerworks/java/library/j-nativememory-linux/ and http://www.ibm.com/developerworks/java/library/j-nativememory-aix/.
The perspective provides two views.
Native memory table view
This view displays a table containing the latest, minimum, and maximum values for all the available native memory information. You can use this table to see the most recent memory usage information for your monitored application.
Native memory usage view
This view plots the process virtual memory and process physical memory on a graph. The information presented helps you to monitor the native memory usage by processes. By comparing this graph to the Used Heap graph in the garbage collection perspective, you can see whether the amount of memory used by an application is due to the size of the Java Heap or due to the memory allocated natively.


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