SQL Server performance in Azure VMs
Many customers are concerned about how their critical workloads will perform after migrating to the public cloud. Given the multitude of VM types available within Azure, there is an extremely wide range of performance options. You can build a VM that's as small as 1 CPU and 0.75 GB of RAM all the way to 416 vCPUs and 12 TB of memory. Beyond that, each VM has a specific limit on storage and network bandwidth and the number of IOPS that the VM can perform. It is important when you are planning a migration to monitor your on-premises workloads so that you can make your Azure footprint the right size. This is particularly important for a relational database management system (RDBMS) such as SQL Server, which is I/O and memory intensive and does not offer easy horizontal scale options such as a web or application tier. Typically, if you have to increase the performance of SQL Server, you have two choices: purchase more hardware or optimize your queries...