Automatic tuning in SQL Server 2017
As mentioned, Query Store was introduced in SQL Server 2016 and it is a great tool for identifying regressed queries, especially after the version upgrade. You can use different reports to search for regressed queries or query the appropriate catalog views. However, in production databases, you could have thousands of queries, and if regressed queries are top-consuming queries, you will need time and patience to identify significantly regressed but less frequently executed queries. It would be nice if Query Store did this and created notifications for you, so that you can easily and quickly see all regressed queries in a database. This feature was not available in SQL Server 2016, but SQL Server 2017 brings it in as part of the new Automatic Tuning
feature.
Note
In the SQL Server 2016 production environment, I have created notifications on top of Query Store catalog views, in order to quickly identify queries that recently got new execution plan(s) with...