title: How to test Azure Function Scalability?
body: <p>As we're new to the Azure Function App where we heard one of its great functionality was <strong>scalability</strong>, but how did azure function scale works out? Was it automatically scaling in behind or any mechanism we can set up? For example, max of scale size limitation.</p>
  
  <p>When we debug the azure function locally (we've tried <em>ServiceBusTrigger, EventHubTrigger, QueueTrigger and CosmosDBTrigger</em>), it seems like <strong>every time the same function instance was called multiple times over and over</strong> while we continue sending messages, which doesn't work as scaling/working parallel as we expected, is there any good way of debugging the scalability locally?</p>