Name
PerformanceCounter
Synopsis
This class represents a Windows NT, 2000, or XP performance counter that
can be accessed using the Performance
Administrative Tool. PerformanceCounter
s
already exist for system devices, such as processor, disk, or memory
usage, as well as for system resources, such as processes or
threads. Using the PerformanceCounter
class,
you can both read from and write performance data to existing custom counters.
To create your own custom performance counters, use
PerformanceCounterCategory.Create()
. You can
write to a performance counter by using one of the
PerformanceCounter
constructors that takes the
boolean readonly
argument. Set that argument to
false
to create a performance counter that you
can write to. To set the value of a performance counter, call
IncrementBy()
, Increment()
,
Decrement()
, or set the
RawValue
to the desired value.
To access an existing performance counter, create an instance of
PerformanceCounter
with the
CategoryName
and CounterName
set to that of an available category and an existing performance
counter. The category and counter names are case-insensitive, so
you could sample the available memory by calling the constructor as
PerformanceCounter("memory"
, "available mbytes")
.
Consult the Performance Administrative Tool for the available
performance counters. You can explicitly set the
CategoryName
and CounterName
(and the optional InstanceName
and
MachineName
) properties, if you choose not to set
these using the constructor.
To ...
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