By now, you might be aware of the fact that you can create Azure functions in the following two hosting plans:
- App Service plan
- Consumption plan
You will get all the benefits of serverless architecture only when you create the function app using the consumption plan. However, one of the concerns that developers report about using the consumption plan is something called cold starting, which refers to spinning up an Azure function to serve the requests when there have been no requests for quite some time. You can learn more about this topic at https://blogs.msdn.microsoft.com/appserviceteam/2018/02/07/understanding-serverless-cold-start/.
In this recipe, we will learn a technique that could be used to always keep the instance live and warm so that all requests are served properly.