Explanation/Reference:
Explanation:
Application Gateway currently has seven metrics to view performance counters.
Metrics are a feature for certain Azure resources where you can view performance counters in the portal.
For Application Gateway, the following metrics are available:
Total Requests

Failed Requests

Current Connections

Healthy Host Count

Response Status

Throughput

Unhealthy Host count

You can filter on a per backend pool basis to show healthy/unhealthy hosts in a specific backend pool References: https://docs.microsoft.com/en-us/azure/application-gateway/application-gateway- diagnostics#metrics