disk performance counter is not fully functional for Windows operating system virtual machines using data collection rule

Question

When I configured the data collection rule and include both Windows and Linux systems, it only displays the total result for the "% Free Space" performance counter for Windows, instead of showing individual results for each instance, such as the space available based on the number of disks attached to each virtual machine. This occurred while using Azure monitor agent.

However, when using the legacy feature (legacy agent management using LAW) with the same performance counter, I could see the results for each individual instance based on the number of disks attached.

Is there a limitation while using the data collection rule? DCR Result:

Legacy result :

Answer 1

Sachin, thank you for posting this question on Microsoft Q&A and apologies for the delayed response.

I see that you are trying to capture perfmon counter values for all disks using Azure Monitor Agent DCR. In the screenshot shared in the question, the performance counter specified are incorrect for Logical Disk. The correct path should be:

\LogicalDisk(*)\% Free Space

Please refer to the screenshot below:

Note that there are no blank space between "LogicalDisk" and the counter starts with a \

Once the performance counter was specified like this, the instance specific values also started getting collected.

Hope this helps.

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