How do I turn on “always-on” for an Azure Function?

Question

I have a Function App with 3 functions, one of them timer-triggered every 2 minutes. I observed that after a while, the function stops being triggered, but restarts when I g

Answer 1

This answer applies to all Azure Function scenarios with the exception of those that are triggered by an http request.

There are 3 cases to look at:

1. You have a Function App running in a Free/Shared App Service Plan: Always On is not available, and those scenarios are simply not supported.
2. You have a Function App running in a Basic/Standard/Premium App Service Plan: Always On is available and can be turned on. In fact it is on by default, and you'll get a warning in the Functions UI if you turn it off.
3. You have a Function App using a Consumption Plan: there is no need for Always On as the system takes care of waking up your functions whenever they need to run. This is the recommended approach for most users.