DBCC FREESESSIONCACHE (Transact-SQL)
Applies to: 
SQL Server
Azure SQL Managed Instance
Flushes the distributed query connection cache used by distributed queries against an instance of SQL Server.
Transact-SQL syntax conventions
Syntax
DBCC FREESESSIONCACHE [ WITH NO_INFOMSGS ]
Arguments
WITH NO_INFOMSGS
Suppresses all informational messages.
Permissions
Requires membership in the sysadmin fixed server role.
Examples
The following example flushes the distributed query cache.
USE AdventureWorks2022;
GO
DBCC FREESESSIONCACHE WITH NO_INFOMSGS;
GO