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A Windows performance object is defined by a performance object name and a counter name, as well as anything from none to several instances. Furthermore, each performance counter contains a unique set of counters and instances. Some objects are built into the system, typically corresponding to the major hardware components, but others will only be accessible if the associated software has been installed.
Here are some definitions of the items as described by Microsoft:
| • | Performance object: A logical collection of counters that is associated with a resource or service that can be monitored. The objects that are typically installed on a system are: cache, memory, paging file, physical disk, process, processor, server, system and thread. |
| • | Counter: A value corresponding to a particular aspect of the performance defined for the performance object. |
| • | Instance: A term used to distinguish between multiple performance objects of the same type on a computer. |
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