记录一下:阻塞/等待/长时间运行

SELECT r.session_id
      ,r.blocking_session_id
      ,DB_Name(r.database_id) as database_name
      ,r.start_time
      ,r.total_elapsed_time
      ,r.[status]
      ,CASE WHEN r.blocking_session_id <> 0 THEN 'Blocking'
            WHEN r.blocking_session_id = 0 AND r.wait_type is not null THEN 'Waiting'
            ELSE 'Long-running'
       END as slowness_type
      ,r.percent_complete
      ,r.command
      ,r.wait_type
      ,r.wait_time
      ,r.wait_resource
      ,r.last_wait_type
      ,r.cpu_time
      ,r.reads
      ,r.writes
      ,r.logical_reads
      ,t.[text] as executing_batch
      ,SUBSTRING(t.[text],
                 r.statement_start_offset/2,
                 (CASE WHEN r.statement_end_offset = -1 
                       THEN DATALENGTH (t.[text]) --LEN(CONVERT(NVARCHAR(MAX), t.text)) * 2
                  ELSE r.statement_end_offset 
                  END - r.statement_start_offset )/2 + 1) as executing_sql
      ,bt.[text] as blocking_batch
      ,SUBSTRING(bt.[text],
                 br.statement_start_offset/2,
                 (CASE WHEN br.statement_end_offset = -1 
                       THEN DATALENGTH (bt.[text]) --LEN(CONVERT(NVARCHAR(MAX), bt.text)) * 2
                  ELSE br.statement_end_offset 
                  END - br.statement_start_offset )/2 + 1) as blocking_sql
     --,p.query_plan
  FROM sys.dm_exec_requests r
 CROSS APPLY sys.dm_exec_sql_text(r.sql_handle) as t
 CROSS APPLY sys.dm_exec_query_plan(r.plan_handle) as p
  LEFT JOIN sys.dm_exec_requests br
    ON r.blocking_session_id = br.session_id
 OUTER APPLY sys.dm_exec_sql_text(br.session_id) as bt
 WHERE r.session_id > 50 and r.session_id <> @@SPID
   AND r.total_elapsed_time > 30 * 60 * 1000
 ORDER BY r.total_elapsed_time DESC;