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I have an Azure VM Scaleset on Windows VMs, and I am trying to setup an autoscale rule that would increase the number of instances if the Memory utilization gets over a certain threshold. There's an option for Percentage CPU, but not RAM. Tried creating the autoscale rule through Terraform since I saw it in some documentation somewhere, but got an error saying "MetricUnsupported". Is this really not possible?

John Ramos
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Azure VMSS does not support using CPU Utilization in autoscaling rules. It just support CPU Credits Consumed or CPU Credits Remaining. For more details, please refer to the document

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Jim Xu
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  • VMSS does support "Percentage CPU", which is in the doc and is what I meant to say. I updated my original post. This does not answer the question though. – John Ramos Mar 15 '21 at 18:30
  • @JohnRamos We can use the `Percentage CPU` to do that: https://i.stack.imgur.com/6ZZRQ.png. – Jim Xu Mar 16 '21 at 01:29