Metric of Instance Number of an Application Gateway

Question

Is there a metric to measure the number of instances of an Application Gateway?

Answer 1

Hello Martino Pavone

I understand that you are looking for a metric to measure the number of instances of Application Gateway.

However, currently, only the following metrics are available. Please refer to the document below for further details:

Supported metrics for application gateways

But there is a way to measure the number of instances of an Azure Application Gateway, although it is not directly provided as a metric. Instead, you can infer the number of instances by looking at the Capacity Units metric.

Azure Application Gateway's pricing is based on Capacity Units rather than the number of instances. Each instance guarantees a minimum of 10 capacity units in terms of processing capability. Therefore, by examining the Capacity Units metric, you can determine the number of instances. For example, if you see 20 capacity units, it will mean 2 instances, and 22 capacity units would mean 3 instances.

Check the below document for more understanding

https://learn.microsoft.com/en-us/answers/questions/1512866/azure-application-gateway-how-many-instances-am-i

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