DBCC dllname (FREE)
Unloads the specified extended stored procedure dynamic-link library (DLL) from memory.
DBCC dllname ( FREE )
When an extended stored procedure is executed, the DLL remains loaded by Microsoft® SQL Server™ until the server is shut down. This statement allows a DLL to be unloaded from memory without shutting down SQL Server. Execute sp_helpextendedproc to display the DLL files currently loaded by SQL Server.
This example assumes an extended procedure xp_sample is implemented as Xp_sample.dll and has been executed. It uses the DBCC dllname (FREE) statement to unload the Xp_sample.dll file associated with the xp_sample extended procedure.
DBCC xp_sample (FREE)