(SQL) Tip of the Day: Clear the Proc Cache in SQL Azure


Today’s Tip…

You can clear an Azure SQL Database plan cache using this new option similar to running DBCC freeproccache on an on premises.

ALTER DATABASE SCOPED CONFIGURATION (Transact-SQL)

https://msdn.microsoft.com/en-us/library/mt629158.aspx

— run this script against a user database, not master

— count number of plans currently in cache

select count(*) from sys.dm_exec_cached_plans;

— Executing this statement will clear the procedure cache in the current database, which means that all queries will have to recompile.

ALTER DATABASE SCOPED CONFIGURATION CLEAR PROCEDURE_CACHE;

— count number of plans in cache now, after they were cleared from cache

select count(*) from sys.dm_exec_cached_plans;

— list available plans

select * from sys.dm_exec_cached_plans;


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