在压力测试过程中，不间断的按F5键执行上面的SQL语句，如果出现死锁或者堵塞现象，就会在执行结果中罗列出来。如果每次连续执行SQL，都有死锁或者堵塞出现，说明死锁或者堵塞的比较严重。

--每秒死锁数量SELECT  *FROM    sys.dm_os_performance_countersWHERE   counter_name LIKE 'Number of Deadlocksc%';--查询当前阻塞WITH    CTE_SID ( BSID, SID, sql_handle )          AS ( SELECT   blocking_session_id ,                        session_id ,                        sql_handle               FROM     sys.dm_exec_requests               WHERE    blocking_session_id <> 0               UNION ALL               SELECT   A.blocking_session_id ,                        A.session_id ,                        A.sql_handle               FROM     sys.dm_exec_requests A                        JOIN CTE_SID B ON A.SESSION_ID = B.BSID             )    SELECT  C.BSID ,            C.SID ,            S.login_name ,            S.host_name ,            S.status ,            S.cpu_time ,            S.memory_usage ,            S.last_request_start_time ,            S.last_request_end_time ,            S.logical_reads ,            S.row_count ,            q.text    FROM    CTE_SID C             JOIN sys.dm_exec_sessions S ON C.sid = s.session_id            CROSS APPLY sys.dm_exec_sql_text(C.sql_handle) Q    ORDER BY sid