Memory optimized virtual machine sizes

Memory optimized VM sizes offer a high memory-to-CPU ratio that are great for relational database servers, medium to large caches, and in-memory analytics. This article provides information about the number of vCPUs, data disks and NICs as well as storage throughput and network bandwidth for each size in this grouping.

  • The M-Series offers the highest vCPU count (up to 128 vCPUs) and largest memory (up to 3.8 TiB) of any VM in the cloud. It’s ideal for extremely large databases or other applications that benefit from high vCPU counts and large amounts of memory.

  • Dv2-series, G-series, and the DSv2/GS counterparts are ideal for applications that demand faster vCPUs, better temporary storage performance, or have higher memory demands. They offer a powerful combination for many enterprise-grade applications.

  • Dv2-series, a follow-on to the original D-series, features a more powerful CPU. The Dv2-series CPU is about 35% faster than the D-series CPU. It is based on the latest generation 2.4 GHz Intel Xeon® E5-2673 v3 2.4 GHz (Haswell) or E5-2673 v4 2.3 GHz (Broadwell) processors, and with the Intel Turbo Boost Technology 2.0, can go up to 3.1 GHz. The Dv2-series has the same memory and disk configurations as the D-series.

  • The Ev3-series features the E5-2673 v4 2.3 GHz (Broadwell) processor in a hyper-threaded configuration, providing a better value proposition for most general purpose workloads, and bringing the Ev3 into alignment with the general purpose VMs of most other clouds. Memory has been expanded (from 7 GiB/vCPU to 8 GiB/vCPU) while disk and network limits have been adjusted on a per core basis to align with the move to hyperthreading. The Ev3 is the follow up to the high memory VM sizes of the D/Dv2 families.

  • Azure Compute offers virtual machine sizes that are Isolated to a specific hardware type and dedicated to a single customer. These virtual machine sizes are best suited for workloads that require a high degree of isolation from other customers for workloads involving elements like compliance and regulatory requirements. Customers can also choose to further subdivide the resources of these Isolated virtual machines by using Azure support for nested virtual machines. Please see the tables of virtual machine families below for your isolated VM options.

Esv3-series

ACU: 160-190 1

Premium Storage: Supported

Premium Storage Caching: Supported

ESv3-series instances are based on the 2.3 GHz Intel XEON ® E5-2673 v4 (Broadwell) processor and can achieve 3.5GHz with Intel Turbo Boost Technology 2.0 and use premium storage. Ev3-series instances are ideal for memory-intensive enterprise applications.

Size vCPU Memory: GiB Temp storage (SSD) GiB Max data disks Max cached and temp storage throughput: IOPS / MBps (cache size in GiB) Max uncached disk throughput: IOPS / MBps Max NICs / Expected network bandwidth (Mbps)
Standard_E2s_v3 2 16 32 4 4,000 / 32 (50) 3,200 / 48 2 / 1,000
Standard_E4s_v3 2 4 32 64 8 8,000 / 64 (100) 6,400 / 96 2 / 2,000
Standard_E8s_v3 2 8 64 128 16 16,000 / 128 (200) 12,800 / 192 4 / 4,000
Standard_E16s_v3 2 16 128 256 32 32,000 / 256 (400) 25,600 / 384 8 / 8,000
Standard_E32s_v3 2 32 256 512 32 64,000 / 512 (800) 51,200 / 768 8 / 16,000
Standard_E64s_v3 2 64 432 864 32 128,000/1024 (1600) 80,000 / 1200 8 / 30,000
Standard_E64is_v3 3 64 432 864 32 128,000/1024 (1600) 80,000 / 1200 8 / 30,000

1 Esv3-series VM’s feature Intel® Hyper-Threading Technology.

2 Constrained core sizes available.

3 Instance is isolated to hardware dedicated to a single customer.

Ev3-series

ACU: 160 - 190 1

Premium Storage: Not Supported

Premium Storage Caching: Not Supported

Ev3-series instances are based on the 2.3 GHz Intel XEON ® E5-2673 v4 (Broadwell) processor and can achieve 3.5GHz with Intel Turbo Boost Technology 2.0. Ev3-series instances are ideal for memory-intensive enterprise applications.

Data disk storage is billed separately from virtual machines. To use premium storage disks, use the ESv3 sizes. The pricing and billing meters for ESv3 sizes are the same as Ev3-series.

Size vCPU Memory: GiB Temp storage (SSD) GiB Max data disks Max temp storage throughput: IOPS / Read MBps / Write MBps Max NICs / Network bandwidth
Standard_E2_v3 2 16 50 4 3000/46/23 2 / 1,000
Standard_E4_v3 4 32 100 8 6000/93/46 2 / 2,000
Standard_E8_v3 8 64 200 16 12000/187/93 4 / 4,000
Standard_E16_v3 16 128 400 32 24000/375/187 8 / 8,000
Standard_E32_v3 32 256 800 32 48000/750/375 8 / 16,000
Standard_E64_v3 64 432 1600 32 96000/1000/500 8 / 30,000
Standard_E64i_v3 2, 3 64 432 1600 32 96000/1000/500 8 / 30,000

1 Ev3-series VM’s feature Intel® Hyper-Threading Technology.

2 Constrained core sizes available.

3 Instance is isolated to hardware dedicated to a single customer.

M-series

ACU: 160-180 1

Premium Storage: Supported

Premium Storage Caching: Supported

Write Accelerator: Supported

Size vCPU Memory: GiB Temp storage (SSD) GiB Max data disks Max cached and temp storage throughput: IOPS / MBps (cache size in GiB) Max uncached disk throughput: IOPS / MBps Max NICs / Expected network bandwidth (Mbps)
Standard_M8ms 3 8 218.75 256 8 10,000 / 100 (793) 5,000 / 125 4 / 2,000
Standard_M16ms 3 16 437.5 512 16 20,000 / 200 (1,587) 10,000 / 250 8 / 4,000
Standard_M32ts 32 192 1,024 32 40,000 / 400 (3,174) 20,000 / 500 8 / 8,000
Standard_M32ls 32 256 1,024 32 40,000 / 400 (3,174) 20,000 / 500 8 / 8,000
Standard_M32ms 3 32 875 1,024 32 40,000 / 400 (3,174) 20,000 / 500 8 / 8,000
Standard_M64s 64 1,024 2,048 64 80,000 / 800 (6,348) 40,000 / 1,000 8 / 16,000
Standard_M64ls 64 512 2,048 64 80,000 / 800 (6,348) 40,000 / 1,000 8 / 16,000
Standard_M64ms 3 64 1,792 2,048 64 80,000 / 800 (6,348) 40,000 / 1,000 8 / 16,000
Standard_M128s 2, 3 128 2,048 4,096 64 160,000 / 1,600 (12,696) 80,000 / 2,000 8 / 30,000
Standard_M128ms 2, 3, 4 128 3,892 4,096 64 160,000 / 1,600 (12,696) 80,000 / 2,000 8 / 30,000
Standard_M64 64 1,024 7,168 64 80,000 / 800 (1,228) 40,000 / 1,000 8 / 16,000
Standard_M64m 64 1,792 7,168 64 80,000 / 800 (1,228) 40,000 / 1,000 8 / 16,000
Standard_M128 2 128 2,048 14,336 64 250,000 / 1,600 (2,456) 80,000 / 2,000 8 / 32,000
Standard_M128m 2 128 3,892 14,336 64 250,000 / 1,600 (2,456) 80,000 / 2,000 8 / 32,000

1 M-series VM’s feature Intel® Hyper-Threading Technology

2 More than 64 vCPU’s require one of these supported guest OSes: Windows Server 2016, Ubuntu 16.04 LTS, SLES 12 SP2, and Red Hat Enterprise Linux, CentOS 7.3 or Oracle Linux 7.3 with LIS 4.2.1.

3 Constrained core sizes available.

4 Instance is isolated to hardware dedicated to a single customer.

GS-series

ACU: 180 - 240 1

Premium Storage: Supported

Premium Storage Caching: Supported

Size vCPU Memory: GiB Temp storage (SSD) GiB Max data disks Max cached and temp storage throughput: IOPS / MBps (cache size in GiB) Max uncached disk throughput: IOPS / MBps Max NICs / Expected network bandwidth (Mbps)
Standard_GS1 2 28 56 8 10,000 / 100 (264) 5,000 / 125 2 / 2000
Standard_GS2 4 56 112 16 20,000 / 200 (528) 10,000 / 250 2 / 4000
Standard_GS3 8 112 224 32 40,000 / 400 (1,056) 20,000 / 500 4 / 8000
Standard_GS4 3 16 224 448 64 80,000 / 800 (2,112) 40,000 / 1,000 8 / 16000
Standard_GS5 2, 3 32 448 896 64 160,000 / 1,600 (4,224) 80,000 / 2,000 8 / 20000

1 The maximum disk throughput (IOPS or MBps) possible with a GS series VM may be limited by the number, size and striping of the attached disk(s). For details, see Premium Storage: High-performance storage for Azure virtual machine workloads.

2 Instance is isolated to hardware dedicated to a single customer.

3 Constrained core sizes available.


G-series

ACU: 180 - 240

Premium Storage: Not Supported

Premium Storage Caching: Not Supported

Size vCPU Memory: GiB Temp storage (SSD) GiB Max temp storage throughput: IOPS / Read MBps / Write MBps Max data disks / throughput: IOPS Max NICs / Expected network bandwidth (Mbps)
Standard_G1 2 28 384 6000 / 93 / 46 8 / 8 x 500 2 / 2000
Standard_G2 4 56 768 12000 / 187 / 93 16 / 16 x 500 2 / 4000
Standard_G3 8 112 1,536 24000 / 375 / 187 32 / 32 x 500 4 / 8000
Standard_G4 16 224 3,072 48000 / 750 / 375 64 / 64 x 500 8 / 16000
Standard_G5 1 32 448 6,144 96000 / 1500 / 750 64 / 64 x 500 8 / 20000

1 Instance is isolated to hardware dedicated to a single customer.

DSv2-series 11-15

ACU: 210 - 250 1

Premium Storage: Supported

Premium Storage Caching: Supported

Size vCPU Memory: GiB Temp storage (SSD) GiB Max data disks Max cached and temp storage throughput: IOPS / MBps (cache size in GiB) Max uncached disk throughput: IOPS / MBps Max NICs / Expected network bandwidth (Mbps)
Standard_DS11_v2 3 2 14 28 8 8,000 / 64 (72) 6,400 / 96 2 / 1500
Standard_DS12_v2 3 4 28 56 16 16,000 / 128 (144) 12,800 / 192 4 / 3000
Standard_DS13_v2 3 8 56 112 32 32,000 / 256 (288) 25,600 / 384 8 / 6000
Standard_DS14_v2 3 16 112 224 64 64,000 / 512 (576) 51,200 / 768 8 / 12000
Standard_DS15_v2 2 20 140 280 64 80,000 / 640 (720) 64,000 / 960 8 / 25000 4

1 The maximum disk throughput (IOPS or MBps) possible with a DSv2 series VM may be limited by the number, size and striping of the attached disk(s). For details, see Premium Storage: High-performance storage for Azure virtual machine workloads.

2 Instance is isolated to hardware dedicated to a single customer.

3 Constrained core sizes available.

4 25000 Mbps with Accelerated Networking.


Dv2-series 11-15

ACU: 210 - 250

Premium Storage: Not Supported

Premium Storage Caching: Not Supported

Size vCPU Memory: GiB Temp storage (SSD) GiB Max temp storage throughput: IOPS / Read MBps / Write MBps Max data disks / throughput: IOPS Max NICs / Expected network bandwidth (Mbps)
Standard_D11_v2 2 14 100 6000 / 93 / 46 8 / 8x500 2 / 1500
Standard_D12_v2 4 28 200 12000 / 187 / 93 16 / 16x500 4 / 3000
Standard_D13_v2 8 56 400 24000 / 375 / 187 32 / 32x500 8 / 6000
Standard_D14_v2 16 112 800 48000 / 750 / 375 64 / 64x500 8 / 12000
Standard_D15_v2 1 20 140 1,000 60000 / 937 / 468 64 / 64x500 8 / 25000 2

1 Instance is isolated to hardware dedicated to a single customer.

2 25000 Mbps with Accelerated Networking.


Size table definitions

  • Storage capacity is shown in units of GiB or 1024^3 bytes. When comparing disks measured in GB (1000^3 bytes) to disks measured in GiB (1024^3) remember that capacity numbers given in GiB may appear smaller. For example, 1023 GiB = 1098.4 GB
  • Disk throughput is measured in input/output operations per second (IOPS) and MBps where MBps = 10^6 bytes/sec.
  • Data disks can operate in cached or uncached modes. For cached data disk operation, the host cache mode is set to ReadOnly or ReadWrite. For uncached data disk operation, the host cache mode is set to None.
  • If you want to get the best performance for your VMs, you should limit the number of data disks to 2 disks per vCPU.
  • Expected network bandwidth is the maximum aggregated bandwidth allocated per VM type across all NICs, for all destinations. Upper limits are not guaranteed, but are intended to provide guidance for selecting the right VM type for the intended application. Actual network performance will depend on a variety of factors including network congestion, application loads, and network settings. For information on optimizing network throughput, see Optimizing network throughput for Windows and Linux. To achieve the expected network performance on Linux or Windows, it may be necessary to select a specific version or optimize your VM. For more information, see How to reliably test for virtual machine throughput.

Other sizes

Next steps

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