Constrained vCPU capable VM sizes

Some database workloads like SQL Server or Oracle require high memory, storage, and I/O bandwidth, but not a high core count. Many database workloads are not CPU-intensive. Azure offers certain VM sizes where you can constrain the VM vCPU count to reduce the cost of software licensing, while maintaining the same memory, storage, and I/O bandwidth.

The vCPU count can be constrained to one half or one quarter of the original VM size. These new VM sizes have a suffix that specifies the number of active vCPUs to make them easier for you to identify.

For example, the current VM size Standard_GS5 comes with 32 vCPUs, 448 GB RAM, 64 disks (up to 256 TB), and 80,000 IOPs or 2 GB/s of I/O bandwidth. The new VM sizes Standard_GS5-16 and Standard_GS5-8 comes with 16 and 8 active vCPUs respectively, while maintaining the rest of the specs of the Standard_GS5 for memory, storage, and I/O bandwidth.

The licensing fees charged for SQL Server or Oracle are constrained to the new vCPU count, and other products should be charged based on the new vCPU count. This results in a 50% to 75% increase in the ratio of the VM specs to active (billable) vCPUs. These new VM sizes that are only available in Azure, allowing workloads to push higher CPU utilization at a fraction of the (per-core) licensing cost. At this time, the compute cost, which includes OS licensing, remains the same one as the original size. For more information, see Azure VM sizes for more cost-effective database workloads.

Name vCPU Specs
Standard_M64-32ms 32 Same as M64ms
Standard_M64-16ms 16 Same as M64ms
Standard_M128-64ms 64 Same as M128ms
Standard_M128-32ms 32 Same as M128ms
Standard_E4-2s_v3 2 Same as E4s_v3
Standard_E8-4s_v3 4 Same as E8s_v3
Standard_E8-2s_v3 2 Same as E8s_v3
Standard_E16-8s_v3 8 Same as E16s_v3
Standard_E16-4s_v3 4 Same as E16s_v3
Standard_E32-16_v3 16 Same as E32s_v3
Standard_E32-8s_v3 8 Same as E32s_v3
Standard_E64-32s_v3 32 Same as E64s_v3
Standard_E64-16s_v3 16 Same as E64s_v3
Standard_GS4-8 8 Same as GS4
Standard_GS4-4 4 Same as GS4
Standard_GS5-16 16 Same as GS5
Standard_GS5-8 8 Same as GS5
Standard_DS11-1_v2 1 Same as DS11_v2
Standard_DS12-2_v2 2 Same as DS12_v2
Standard_DS12-1_v2 1 Same as DS12_v2
Standard_DS13-4_v2 4 Same as DS13_v2
Standard_DS13-2_v2 2 Same as DS13_v2
Standard_DS14-8_v2 8 Same as DS14_v2
Standard_DS14-4_v2 4 Same as DS14_v2

Other sizes

Next steps

Learn more about how Azure compute units (ACU) can help you compare compute performance across Azure SKUs.