Sometimes when in a testing mode I do like to clear cache within my SQL database (Azure). Nowadays a lot of my test databases are Azure based so how I clear cache is different to how I would do it with an older “earthed” SQL Server.

Looking at my locally installed SQL Server.

SELECT @@VERSION

Getting some basic information about the cache for a specific database.

 SELECT st.dbid, cp.objtype, cp.size_in_bytes
FROM sys.dm_exec_cached_plans AS cp
CROSS APPLY sys.dm_exec_sql_text(cp.plan_handle) st
WHERE dbid = 12
OPTION (RECOMPILE);

Normally I would run:

-- Database_ID
DBCC FLUSHPROCINDB (12);

I have cleared it out.

So, lets go to the Azure world.

SELECT @@VERSION

Again, get some basic information for my database ID.

SELECT st.dbid, cp.objtype, cp.size_in_bytes
FROM sys.dm_exec_cached_plans AS cp
CROSS APPLY sys.dm_exec_sql_text(cp.plan_handle) st
WHERE dbid = 6
OPTION (RECOMPILE);

-- Database_ID
DBCC FLUSHPROCINDB (6);

Just does not happen: Msg 15247, Level 16, State 14, Line 9

User does not have permission to perform this action – I am not sure what permission I need? I am logging in as a server admin.

So I used the following instead.

ALTER DATABASE SCOPED CONFIGURATION CLEAR PROCEDURE_CACHE ;

Filed under: Azure SQL DB