Basv2-series virtual machines run on the AMD's third Generation EPYC™ 7763v processor in a multi-threaded configuration with up to 256 MB L3 cache configuration. This series provides low cost CPU burstable general purpose virtual machines. Basv2-series virtual machines utilize a CPU credit model to track how much CPU is consumed. The virtual machine accumulates CPU credits when a workload is operating below the base CPU performance threshold and, uses credits when running above the base CPU performance threshold, until all of its credits are consumed. Upon consuming all the CPU credits, a Basv2-series virtual machine is throttled back to its base CPU performance until it accumulates the credits to CPU burst again.
Basv2-series virtual machines offer a balance of compute, memory, and network resources, and are a cost effective way to run a broad spectrum of general purpose workloads. These include large scale micro-services, small and medium databases, virtual desktops, and business-critical applications. This series also offers an affordable option to run your code repositories and dev/test environments. Basv2-Series offers virtual machines of up-to 32 vCPU and 128 Gib of RAM, with max network bandwidth of upto 6,250 Mbps and max uncached disk throughput of 600 Mbps. Basv2-series virtual machines also support attachments of Standard SSD, Standard HDD, Premium SSD disk types with a default Remote-SSD support, you can also attach Ultra Disk storage based on its regional availability. Disk storage is billed separately from virtual machines.
Base CPU performance, Credits, and other CPU bursting related info
Size Name
Base CPU Performance of VM (%)1
Initial Credits (Qty.)
Credits banked/hour (Qty.)
Max Banked Credits (Qty.)
Standard_B2ats_v2
20%
60
24
576
Standard_B2als_v2
30%
60
36
864
Standard_B2as_v2
40%
60
48
1152
Standard_B4als_v2
30%
120
72
1728
Standard_B4as_v2
40%
120
96
2304
Standard_B8als_v2
30%
240
144
3456
Standard_B8as_v2
40%
240
192
4608
Standard_B16als_v2
30%
480
288
6912
Standard_B16as_v2
40%
480
384
9216
Standard_B32als_v2
30%
960
576
13824
Standard_B32as_v2
40%
960
768
18432
CPU Burst resources
1The base CPU performance metric hasn't changed. The updated (2024) numbers were normalized using a 0 - 100% scale. Previously, the scale was 0 - (vCPU x 100%).
1Some sizes support bursting to temporarily increase disk performance. Burst speeds can be maintained for up to 30 minutes at a time.
Storage capacity is shown in units of GiB or 1024^3 bytes. When you compare 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.
Expected network bandwidth is the maximum aggregated bandwidth allocated per VM type across all NICs, for all destinations. For more information, see Virtual machine network bandwidth
Upper limits aren't guaranteed. Limits offer guidance for selecting the right VM type for the intended application. Actual network performance will depend on several factors including network congestion, application loads, and network settings. For information on optimizing network throughput, see Optimize network throughput for Azure virtual machines.
To achieve the expected network performance on Linux or Windows, you may need to select a specific version or optimize your VM. For more information, see Bandwidth/Throughput testing (NTTTCP).
Accelerator (GPUs, FPGAs, etc.) info for each size