Book Image

Professional Azure SQL Managed Database Administration - Third Edition

By : Ahmad Osama, Shashikant Shakya
Book Image

Professional Azure SQL Managed Database Administration - Third Edition

By: Ahmad Osama, Shashikant Shakya

Overview of this book

Despite being the cloud version of SQL Server, Azure SQL Database and Azure SQL Managed Instance stands out in various aspects when it comes to management, maintenance, and administration. Updated with the latest Azure features, Professional Azure SQL Managed Database Administration continues to be a comprehensive guide for becoming proficient in data management. The book begins by introducing you to the Azure SQL managed databases (Azure SQL Database and Azure SQL Managed Instance), explaining their architecture, and how they differ from an on-premises SQL server. You will then learn how to perform common tasks, such as migrating, backing up, and restoring a SQL Server database to an Azure database. As you progress, you will study how you can save costs and manage and scale multiple SQL databases using elastic pools. You will also implement a disaster recovery solution using standard and active geo-replication. Finally, you will explore the monitoring and tuning of databases, the key features of databases, and the phenomenon of app modernization. By the end of this book, you will have mastered the key aspects of an Azure SQL database and Azure SQL managed instance, including migration, backup restorations, performance optimization, high availability, and disaster recovery.
Table of Contents (14 chapters)
13
Index

Monitoring an Azure SQL Database and SQL Managed Instance using DMVs

DMVs return diagnostic data that can be used to monitor a database's health and performance. We'll cover monitoring data metrics, connection statistics, blocking status, and query performance in the following sections.

Monitoring database metrics

The Azure SQL Database metrics available on the Azure portal can also be monitored using the sys.resource_stats DMV. This DMV returns the historical analysis for all the databases in an Azure SQL server. For SQL Managed Instance, you can use the sys.server_resource_stats DMV to monitor SQL Managed Instance CPU storage usage. The data for this DMV is collected and aggregated every 5 minutes and is retained for 14 days.

The following query returns the resource utilization from the last six hours for the Azure SQL Database:

-- Execute in master database
-- Get utilization in last 6 hours for the toystore database 
Declare @StartTime DATETIME = DATEADD...