Azure Virtual Machine vcpu and memory configuration error.

Question

Due to my computational needs, I need to create a virtual machine with 64 vcpus and more than 256 GiB of memory. However, these configurations are not available, and an error message stating "64 vCPUs are needed for this configuration, but only 10 vCPUs (of 10) remain for the Standard DDSv4 Family vCPUs." pops up. When I click the "See all sizes" option there are no configurations that match my needs.

During troubleshooting I considered the possibility that this configuration was not available in the region that I had chosen (Italy North), and tried to set different regions, all resulting in the same error message.

What is the problem and how can I solve it?

Answer 1

Hello David Georgiadis

The error:

"64 vCPUs are needed for this configuration, but only 10 vCPUs (of 10) remain for the Standard DDSv4 Family vCPUs."

means that you have vCPU quota limits in your Azure subscription and region.

You’re trying to create a VM that needs 64 vCPUs, but your subscription only has 10 vCPUs remaining in that VM size family (Standard DDSv4) in the selected region (e.g., Italy North).

To address the issue

1. Check Current vCPU Quotas

• Go to: Azure Portal > Subscriptions > Your Subscription > Usage + quotas
• Filter by: Region (e.g., Italy North) and VM family (e.g., DDSv4)
• Check the “vCPUs - Standard DDSv4 Family” usage and limit

2. Request a Quota Increase

To provision a VM with 64 vCPUs, you'll need to increase the quota for that VM family:

1. Go to the Azure Quotas page
2. Choose:
   • Subscription
   • Region
   • VM Series: e.g., Standard DDSv4 Family
3. Click “Request Increase” and set the new value (e.g., 64 or more).
4. Submit the request.

https://learn.microsoft.com/en-us/azure/cost-management-billing/quota/manage-quotas

Answer 2

Hello @David Georgiadis,

This issue occurs if the operating system that runs on the VM doesn't support more than 64 vCPU's.  

More than 64 vCPU's require one of the following supported guest operating systems: Windows Server 2016, Ubuntu 16.04 LTS, SLES 12 SP2, Red Hat Enterprise Linux, CentOS 7.3, or Oracle Linux 7.3 with LIS 4.2.1.

For more information, see Compute optimized virtual machine sizes.

If you have any further queries, do let us know.