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In the Windows performance monitor tool. What's the difference between _Total and , when selecting instances for a counter?
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To analyze counter data with the Perfmon Viewer, you can use the controls and indicators that exist in the lower and upper sectors of the viewer interface, which are referred to as the Counter Table and the Data Grid, respectively. The controls can change the way you display the data to facilitate analysis.
Performance Monitor (PerfMon) is a tool that comes built-in with Windows and allows you to look into the performance of your system and the applications that are running on it. It gives you a way to view data points that are associated with these applications and link them with the effect they have on your system.
I believe the _Total counter is simply an aggregate for situations where there are multiple instances of the same counter. In certain cases, like Processor - % Process Time, it provides an average across all the instances.
Selecting the 'All instances' option is just a shortcut way of including all the instance counters (saving you the trouble of selecting each one individually).
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