title: How to configure the pre-warmed instances in Azure Functions Premium?
body: <p>We were experiencing timeouts the first time a function from a <code>Function App</code> was being called so we move from a normal to premium service plan as in theory you can have always a warmed instance ready to answer a call (based on <a href="https://docs.microsoft.com/es-es/azure/azure-functions/functions-premium-plan" rel="nofollow noreferrer">this documentation</a>).</p>
  
  <p>The thing is that when trying to configure the functionality we cannot see the setting present in the documentation. This is our portal:</p>
  
  <p><a href="https://i.stack.imgur.com/jWmNU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/jWmNU.png" alt="enter image description here"></a></p>
  
  <p>And this is the portal settings appearing in the documentation:</p>
  
  <p><a href="https://i.stack.imgur.com/dCG6c.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dCG6c.png" alt="enter image description here"></a></p>
  
  <p>The functions are still timing out the first time they are called so we did not see any difference moving from a normal plan to the premium one. Are we missing something?</p>