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Azure SQL - Hardware Sizing - Capacity Planning.
Date created: October 1, 2023.
When you plan to migrate a particular particular data source located
on-premises or on Azure IaaS, how to know what is the recommended service tier
or SKU on Azure SQL?
The following tools may help you answer that question:
 | The
Azure Data Migration Assistant tool has a SKU or service tier
recommendation feature that allows you to both collect performance data from
your source SQL Server instances hosting your databases, and recommends
minimum Azure SQL Database, Azure SQL Managed Instance, or SQL Server on
Azure VM SKU based on the data collected. The feature provides
recommendations related to pricing tier, compute level, and data size. This
functionality is currently available only via the Command Line Interface (CLI). |
| In addition, the
Azure SQL Migration extension for Azure Data Studio helps you to
assess your database requirements, get the right-sized SKU recommendations
for Azure resources, and migrate your SQL Server database to Azure. This
documentation helps you to learn how to collect performance data from your
source SQL Server instance to get right-sized Azure recommendations for your
Azure SQL targets, including Azure SQL Database and Azure Managed Instance. |
But what about right-sizing an existent Azure SQL or Azure SQL Managed
Instance workload?
| You can make use of Microsoft Azure Well-Architected Framework to
optimize costs. Read
here for more details. |
| Please consider to capture over time the output of the
sys.dm_db_resource_stats Management View and analyze it to identify
patterns on resource consumption. If you see that at all hours all days of
the week the resource consumption are low, then proceed to scale down the
database. If you identify different patterns of consumption (for example
different consumption during business hours, on week days at night, on
weekends another pattern, on holidays another one) then use Azure Automation
to schedule the scale up or down of the database as needed to reduce costs. |
| You should also consider using some
tips for Azure SQL Managed Instance to save on costs like the new
start-stop feature, try new hardware generations with more RAM available for
the same price, making use of the Azure Hybrid Benefit, make use of
reservations and make use of free licenses for geo-disaster recovery. |
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