sql find longest running job step

/*============================================= 
  Variables: 
    @MinHistExecutions - Minimum number of job step executions we want to consider 
    @MinAvgSecsDuration - Threshold for minimum job step duration we care to monitor 
    @HistoryStartDate - Start date for historical average 
    @HistoryEndDate - End date for historical average 
  
  These variables allow for us to control a couple of factors. First 
  we can focus on job steps that are running long enough on average for 
  us to be concerned with (say, 30 seconds or more). Second, we can 
  avoid being alerted by job steps that have run so few times that the 
  average and standard deviations are not quite stable yet. This script 
  leaves these variables at 1.0, but I would advise you alter them 
  upwards after testing. 
  
  Returns: One result set containing a list of job steps that 
  are currently running and are running longer than two standard deviations 
  away from their historical average. The "Min Threshold" column 
  represents the average plus two standard deviations. 
  
  note [1] - comment this line and note [2] line if you want to report on all history for job steps 
  note [2] - comment just this line is you want to report on running and non-running job steps 
 =============================================*/ 
  
DECLARE   @HistoryStartDate datetime 
  ,@HistoryEndDate datetime  
  ,@MinHistExecutions int   
  ,@MinAvgSecsDuration int  
  
SET @HistoryStartDate = '19000101' 
SET @HistoryEndDate = GETDATE() 
SET @MinHistExecutions = 1.0 
SET @MinAvgSecsDuration = 1.0 
  
DECLARE @currently_running_jobs TABLE ( 
    job_id UNIQUEIDENTIFIER NOT NULL 
    ,last_run_date INT NOT NULL 
    ,last_run_time INT NOT NULL 
    ,next_run_date INT NOT NULL 
    ,next_run_time INT NOT NULL 
    ,next_run_schedule_id INT NOT NULL 
    ,requested_to_run INT NOT NULL 
    ,request_source INT NOT NULL 
    ,request_source_id SYSNAME NULL 
    ,running INT NOT NULL 
    ,current_step INT NOT NULL 
    ,current_retry_attempt INT NOT NULL 
    ,job_state INT NOT NULL 
    ) 
  
--capture details on jobs 
INSERT INTO @currently_running_jobs 
EXECUTE master.dbo.xp_sqlagent_enum_jobs 1,'' 
  
;WITH JobStepsHistData AS 
( 
  SELECT job_id, step_id 
,date_executed=msdb.dbo.agent_datetime(run_date, run_time) 
,secs_duration=run_duration/10000*3600 
                      +run_duration%10000/100*60 
                      +run_duration%100 
  FROM msdb.dbo.sysjobhistory 
  WHERE run_status = 1 -- Succeeded 
) 
,JobHistStats AS 
( 
  SELECT job_id, step_id 
        ,AvgDuration = AVG(secs_duration*1.) 
        ,AvgPlus2StDev = AVG(secs_duration*1.) + 2*stdevp(secs_duration) 
  FROM JobStepsHistData 
  WHERE date_executed >= DATEADD(day, DATEDIFF(day,'19000101',@HistoryStartDate),'19000101') 
  AND date_executed < DATEADD(day, 1 + DATEDIFF(day,'19000101',@HistoryEndDate),'19000101')   
  GROUP BY job_id, step_id 
  HAVING COUNT(*) >= @MinHistExecutions 
  AND AVG(secs_duration*1.) >= @MinAvgSecsDuration 
) 
-- need to select from the CTE's, and join to msdb for final result 
SELECT jd.job_id 
      ,j.name AS [JobName] 
      ,sjs.step_id 
    ,sjs.step_name 
      ,MAX(act.start_execution_date) AS [ExecutionDate] 
      ,AvgDuration AS [Historical Avg Duration (secs)] 
      ,AvgPlus2StDev AS [Min Threshhold (secs)] 
FROM JobStepsHistData jd 
JOIN JobHistStats jhs on jd.job_id = jhs.job_id AND jd.step_id = jhs.step_id 
JOIN msdb..sysjobs j on jd.job_id = j.job_id 
JOIN msdb..sysjobsteps sjs on jd.job_id = sjs.job_id AND jd.step_id = sjs.step_id 
JOIN @currently_running_jobs crj ON crj.job_id = jd.job_id --see note [1] above 
JOIN msdb..sysjobactivity AS act ON act.job_id = jd.job_id 
AND act.stop_execution_date IS NULL 
AND act.start_execution_date IS NOT NULL 
WHERE DATEDIFF(SS, act.start_execution_date, GETDATE()) > AvgPlus2StDev 
AND crj.job_state = 1 --see note [2] above 
GROUP BY jd.job_id, j.name, sjs.step_id, sjs.step_name, AvgDuration, AvgPlus2StDev