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vCPU Overcommit ratio

Handian Sudianto 6,621 Reputation points
2024-02-16T06:30:53.9+00:00

On vmware there are CPU Overcommit ratio, on azure is there any kind of this? How many ratio used by azure for each one physical core?

Azure Virtual Machines
Azure Virtual Machines
An Azure service that is used to provision Windows and Linux virtual machines.
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  1. Andreas Baumgarten 129.5K Reputation points MVP Volunteer Moderator
    2024-02-16T06:41:25.7533333+00:00

    Hi @Handian Sudianto ,

    the ratio of vCPU and physical CPU core are depending on the VM series and listed here:

    Azure compute unit (ACU)

    (If the reply was helpful please don't forget to upvote and/or accept as answer, thank you)

    Regards

    Andreas Baumgarten

    1 person found this answer helpful.

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  1. Prrudram-MSFT 28,486 Reputation points Microsoft Employee Moderator
    2024-02-27T07:52:55.41+00:00

    Hello Handian Sudianto

    In VMware, the CPU overcommit ratio specifies the number of virtual CPUs that can be assigned to a virtual machine per physical core. In Azure, the equivalent feature is called vCPU-to-core ratio, which specifies the number of virtual CPUs that can be assigned to a virtual machine per physical core.

    The default vCPU-to-core ratio in Azure is 8:1 for most big VM sizes, but it can vary depending on the VM size and the region. It's important to note that oversubscribing CPUs can impact performance, so it's recommended to monitor CPU usage and adjust the ratio as needed. As suggested by Andreas Baumgarten you can check the SKU sizes with vCPU:Core ratio.

    If I have answered your query, please click "Accept as answer" as a token of appreciation

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