--每秒死锁数量

SELECT  *

FROM    sys.dm_os_performance_counters

WHERE   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

======解决方案：重新分离和附加一下数据库