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Azure Function on consumption plan cold start can be up to 30 minutes

  • Thread starter Thread starter Cristian E.
  • Start date Start date
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Cristian E.

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I have an azure function v3, written in C#, using the class library approach.

  • The function is triggered by blob storage.
  • The function is using a Consumption plan.

The problem is that cold starts can be as long as 30 minutes! I have consulted the documentation from this link

But there is no specific figures with regards to expected cold start timings.

An interesting observation is that if I navigate to the portal, and hit Refresh button:

enter image description here

Then the function gets immediately triggered.

  1. Is this normal, expected behavior?
  2. Could you please point me to any docs explicitly stating that ~0-30-50mins is OK for cold starts on Consumption Plan?
<p>I have an azure function v3, written in C#, using the class library approach.</p>
<ul>
<li>The function is triggered by blob storage.</li>
<li>The function is using a Consumption plan.</li>
</ul>
<p>The problem is that <strong>cold starts can be as long as 30 minutes</strong>! I have consulted the documentation from <a href="https://learn.microsoft.com/en-us/azure/azure-functions/functions-scale#cold-start-behavior" rel="nofollow noreferrer">this link</a></p>
<p>But there is no specific figures with regards to expected cold start timings.</p>
<p>An interesting observation is that if I navigate to the portal, and hit Refresh button:</p>
<p><a href="https://i.sstatic.net/sG7pG.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/sG7pG.png" alt="enter image description here" /></a></p>
<p>Then the function gets immediately triggered.</p>
<ol>
<li>Is this normal, expected behavior?</li>
<li>Could you please point me to any docs explicitly stating that ~0-30-50mins is OK for cold starts on Consumption Plan?</li>
</ol>
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