sys.dm_exec_procedure_stats - 我是否正確解釋

Question

如果下面查詢中使用dm_exec_procedure_stats的[Total Duration（s）]列給我查詢返回其結果所需的平均時間，是否有人可以confim？我擔心這只是這些查詢返回結果的時間中的一個因素，因爲它們顯得太低。

感謝大家花時間看看。

任何幫助或提醒，將不勝感激

SELECT SUBSTRING(qt.TEXT, CHARINDEX('USP_', qt.TEXT, 1), CHARINDEX(']', qt.TEXT, CHARINDEX('USP_', qt.TEXT, 1)) - CHARINDEX('USP_', qt.TEXT, 1)) AS Procedure_Name, 
     qt.TEXT, 
     CAST(total_elapsed_time/1000000.0 AS DECIMAL(28, 2))                     AS [Total Duration (s)], 
     CASE 
     WHEN execution_count = 0 THEN 0 
     ELSE CAST(total_worker_time * 100.0/total_elapsed_time AS DECIMAL(28, 2)) 
     END                                  AS [% CPU], 
     CASE 
     WHEN execution_count = 0 THEN 0 
     ELSE CAST((total_elapsed_time - total_worker_time) * 100.0/total_elapsed_time AS DECIMAL(28, 2)) 
     END                                  AS [% Waiting], 
     execution_count, 
     CASE 
     WHEN execution_count = 0 THEN 0 
     ELSE CAST(total_elapsed_time/1000000.0/execution_count AS DECIMAL(28, 2)) 
     END                                  AS [Average Duration (s)], 
     sql_handle, 
     plan_handle, 
     object_id, 
     total_elapsed_time, 
     total_worker_time, 
     execution_count, 
     total_physical_reads, 
     total_logical_reads, 
     total_logical_writes 
FROM sys.dm_exec_procedure_stats qs 
     CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) AS qt 
WHERE qt.text LIKE '%USP%' 

ORDER BY 1 

Answer 1

獲得平均時間，你需要劃分TOTAL/COUNT然後1000000.0除以得到秒。

這裏是代碼：

,CONVERT(DECIMAL(26,10),(qs.total_elapsed_time/qs.execution_count))/1000000.0 AS [avg_elapsed_time_inSec]