The B-series VMs are ideal for workloads that have burstable performance requirements that do not need the full performance of the CPU continuously, such as web servers, proof of concepts, small databases, and development build environments. The B-series provide you with the ability to purchase a VM size with baseline performance that can build up credits when it is using less than its baseline. When the VM has accumulated credits, the VM can burst above the baseline using up to 100 percent of the vCPU when your application requires higher CPU performance. We have added to the B-series family on Azure Database for MySQL – Flexible Server in the following SKUs: 4, 8, 12, 16, and 20 vCores SKUs.
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