dotnet / dotnet/dotnet-api-docs

Add information on using V2 performance counters

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area-System.Diagnostics.PerformanceCounter Pri2
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Description

### Type of issue

Additional information needed.

### Description

Performance counters are implemented as either V1 or V2, and V2 is not fully supported. This should be documented as well as any workaround such as using lower-level P/Invoke calls discussed at https://learn.microsoft.com/windows/win32/perfctrs/using-the-pdh-functions-to-consume-counter-data.

For V2, `CounterSample.CounterTimeStamp` uses a different "origin point" for the time affecting other members such as `NextValue()` leading to zeros being returned, for example.

An example of a V2 performance counter is "HTTP Service Request Queues\MaxQueueItemAge".

### Page URL

https://learn.microsoft.com/en-us/dotnet/api/system.diagnostics.performancecounter?view=net-8.0

### Content source URL

https://github.com/dotnet/dotnet-api-docs/blob/main/xml/System.Diagnostics/PerformanceCounter.xml

### Document Version Independent Id

2d744cbe-19e0-46da-2b4c-d87599c4b877

### Article author

steveharter

Contributor guide

Open the contributing guide

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