RunningQueries - performance improvement

Improve performance of RunningQueries collection by adding a HASH join hint.  The hint is to avoid a nested loops join which results in multiple executions of the DMV.  This can be a problem when the DMVs return a large number of rows.
#1663

Author: DavidWiseman

DBADash/SQL/SQLRunningQueries.sql

@@ -76,8 +76,8 @@ LEFT HASH JOIN (
 		INNER HASH JOIN sys.dm_tran_active_transactions AT ON ST.transaction_id = AT.transaction_id
 		GROUP BY ST.session_id
 	) AS t ON s.session_id = t.session_id' ELSE '' END + '
-INNER JOIN sys.dm_exec_connections c ON c.session_id= s.session_id
-LEFT JOIN sys.dm_exec_requests r on s.session_id = r.session_id' 
+INNER HASH JOIN sys.dm_exec_connections c ON c.session_id= s.session_id
+LEFT HASH JOIN sys.dm_exec_requests r on s.session_id = r.session_id' 
 + CASE WHEN @CollectTempDB=1 THEN '
 LEFT HASH JOIN (	SELECT	tsu.request_id,
 							tsu.session_id,
@@ -175,4 +175,4 @@ BEGIN
 			writes,
 			dormant_duration
 	FROM sys.dm_exec_cursors (0) c
-END
+END