An Azure relational database service.
Hi Mudhu,
Most important thing is to consider CPU , Memory and IO. All three metrics are key.
Unfortunately there is not a formula to get the right size. The main benefits in Azure is that you can scale up and down any Azure VM so if you need more horse power you can easily do it.
It is also important to follow the best practices for SQL Server on Azure VMs to make sure to take all the benefits
Best practices for SQL Server on Azure VMs
Regards
Javier