Windows sysinternals

Chapter 3 Process Explorer 59
■ Virtual Size The amount of the process’ virtual memory that has been reserved or
committed.
■ Memory Priority In Windows Vista and newer, the default memory priority that is
assigned to physical memory pages used by the process. Pages that are cached in RAM
and not part of any working set get repurposed starting with the lowest priority.
■ Minimum Working Set The amount of physical memory reserved for the process; the
operating system guarantees that the process’ working set can always be assigned at
least this amount. The process can also lock pages in the working set up to that amount
minus eight pages. This minimum does not guarantee that the process’ working set will
always be at least that large, unless a hard limit has been set by a resource management
application.
■ Maximum Working Set Indicates the maximum amount of working set assigned to
the process. However, this number is ignored by Windows unless a hard limit has been
configured for the process by a resource management application.
■ Working Set Size The amount of physical memory assigned to the process by the
memory manager.
■ Peak Working Set Size The largest working set size the process has had since its start.
■ WS Shareable Bytes The portion of the process’ working set that contains memory
that can be shared with other processes, such as mapped executable images.
■ WS Shared Bytes The portion of the process’ working set that contains memory that
is currently shared with other processes.
■ WS Private Bytes The portion of the process’ working set that contains private bytes
that cannot be shared with other processes.
■ GDI Objects The number of Graphics Device Interface (GDI) objects—such as brushes,
fonts, and bitmaps—owned by the process.
■ USER Objects The number of USER objects—such as windows and menus—owned by
the process.
Note that GDI and USER objects are created by the windowing subsystem in the process’
terminal server session. They are not kernel objects and do not have security descriptors
associated with them.
.NET Tab
The .NET tab (shown in Figure 3-10) contains performance counters that measure behaviors
of processes that use the .NET framework version 1.1 or higher.
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