Native Memory Page
The Native Memory Page presents information about the native memory of a process. Native memory is the memory managed by the operating system, rather than the Common Language Runtime.
Selecting memory to show
To select the memory to show, the three radio buttons on the page can be used:
•
Show memory of snapshot
This option is used to show the memory
of the currently selected snapshot.
•
Show memory difference between snapshot
This option is used to
show the memory difference between the selected snapshot and the comparison
snapshot (i.e., the memory entries of the comparison snapshot are subtracted
from the memory entries of the selected snapshot).
•
Show memory of process
This option is used to show the memory
of any process running on the system (including non-.NET processes). The
dropdown list to the right of this option is used to select the process for
which memory is to be shown. A separate snapshot of the native memory of the
process is taken when this option is selected or when the Refresh button is
pressed.
Two views are used to present information about the native memory:
•
Committed memory
This view is used to present the committed
memory of a process. Committed memory is memory for which physical storage (in
memory or on disk) has been allocated. The physical storage on disk includes the
paging file and files that are mapped into the memory of the process (e.g., by
loading a DLL).
•
Physical memory
This view is used to present the physical
memory of a process. Physical memory is the part of the committed memory that
has been mapped to physical memory in the computer. The total sum of this view
is the value presented as Memory usage by the Task manager.
NOTE! The amount of committed memory may be significantly greater than the amount of total memory of the system. For instance, loading a DLL file into the memory of a process makes the whole DLL become part of committed memory, but only the parts of the DLL that are actually used by the process will be mapped to physical memory. For more information, read about “Memory Management” in the Platform SDK documentation.
Trim working set
This button can be used to trim the working set of the selected process. All physical memory is swapped out to the paging file, module, or memory mapped file. It effectively sets the used physical memory to zero. As soon as memory is needed, it will be swapped back into physical memory.
By trimming the working set, it is possible to find the physical memory requirements of the process. Since all memory is swapped out, the physical memory presented is only the physical memory used after trimming the working set. Any memory used only for startup of the process will not be included.
Memory View|
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