| title | description | author | ms.author | ms.date | ms.service | ms.subservice | ms.topic | ms.custom | helpviewer_keywords | monikerRange | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Validate Plan Guides After Upgrade |
When you upgrade your application to a new release of SQL Server, we recommend that you re-evaluate and test plan guide definitions. |
MikeRayMSFT |
mikeray |
03/14/2017 |
sql |
performance |
how-to |
|
|
=azuresqldb-current || >=sql-server-2016 || >=sql-server-linux-2017 || =azuresqldb-mi-current || =fabric |
[!INCLUDE SQL Server Azure SQL Database Azure SQL Managed Instance FabricSQLDB]
Important
Query Store hints provide an easier-to-use method for shaping query plans without changing application code. Query Store hints are simpler than plan guides. Query Store hints are available in [!INCLUDE ssazure-sqldb], [!INCLUDE fabric-sqldb], [!INCLUDEssazuremi-md], and in [!INCLUDEsssql22-md] and later versions.
We recommend re-evaluating and testing plan guide definitions when you upgrade your application to a new release of [!INCLUDEssNoVersion]. Performance tuning requirements and plan guide matching behavior may change. Although an invalid plan guide will not cause a query to fail, the plan is compiled without using the plan guide and may not be the best choice. After upgrading a database to a newer version of the [!INCLUDE ssde-md], we recommend that you perform the following tasks:
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Validate existing plan guides by using the sys.fn_validate_plan_guide function.
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Use extended events to monitor for misguided plans for some period of time by using the Plan Guide Unsuccessful event.