You are the Azure administrator for a web API that uses the Free plan.
You need to monitor the web API to determine whether or not you should change the plan to Basic.
Which metric should you monitor?
You should monitor CPU time. This represents the number of CPU minutes used by the web API. For the Free plan, a web app or web API is allowed 60 CPU minutes per day. By monitoring this metric, you can decide whether or not to scale up the web API.
You should not monitor Average Response Time. This represents the average number of milliseconds used to serve a single request. An App Service Plan can affect the response time, but it is not feasible to use the response time to determine whether or not to scale up an app due to other factors. For example, the average response time can increase due to the number of simultaneous requests made, such as during peak times.
You should not monitor Requests. This represents the total number of HTTP requests made to the web API. An App Service Plan does not limit the number of requests made to a web API.
You should not monitor Thread Count. This represents the total number of working threads used to service requests. An App Service Plan does not limit the number of threads used by a web API.