Azure vm size includes 2 vcpu's (from 1 vcpu) but Task Manager lists 1 core and 1 virtual processor. Why?

Jason Proos 1 Reputation point

I've recently resized an Azure vm to include 2 vcpu's (from a vm size with 1 vcpu) but Task Manager still only lists 1 core and 1 virtual processor. Why?


I have restarted the vm 2x. The RAM did adjust to the new vm size ( 8 GB) after a restart.

Azure Virtual Machines
Azure Virtual Machines
An Azure service that is used to provision Windows and Linux virtual machines.
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  1. kobulloc-MSFT 25,316 Reputation points Microsoft Employee

    Hello, @Jason Proos !

    What VM size did you start with and what VM size did you resize to? That will help determine why you are only seeing 1 core in the Task Manager after resizing to 2 cores.

    It appears that you went from D1 v2 to D2s v3, and in my repro below I'm seeing the appropriate core increase. There are a couple rare instances where the OS may limit the number of cores used but that wouldn't be the case here. I would try redeploying the VM and if you still aren't seeing the core increase you may need to open a support ticket (I would be happy to help you with that process if you would like).

    Resizing the VM
    This is what resizing my D2s V3 (2 cores) to a D4s v3 (4 cores) looks like:

    Starting size: D2s v3 (2 vCPUs)



    Resized: D4s v3 (4 vCPUs)



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  2. Jason Proos 1 Reputation point

    Thanks for your reply. I went from a D1 v2 (as described in a recent invoice) to a D2s v3.

  3. Jason Proos 1 Reputation point

    It looks like I'm using an image from CodeTWO (codetwo-backup-for-office-365)

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