如何监视每个时间跨度每个存储过程的调用计数？

Question

为了诊断一些性能问题，我想更好地了解与系统性能相比调用某些过程的次数。有没有办法获得在特定时间跨度内每个过程被调用的次数？

Answer 1

您可以从动态管理视图(DMV)获得此（以及更多）。要获取特定存储过程的统计信息，请尝试以下查询。

SELECT
    OBJECT_NAME(qt.objectid)
  , qs.execution_count AS [Execution Count]
  , qs.execution_count / DATEDIFF(Second, qs.creation_time, GETDATE()) AS [Calls/Second]
  , qs.total_worker_time / qs.execution_count AS [AvgWorkerTime]
  , qs.total_worker_time AS [TotalWorkerTime]
  , qs.total_elapsed_time / qs.execution_count AS [AvgElapsedTime]
  , qs.max_logical_reads
  , qs.max_logical_writes
  , qs.total_physical_reads
  , DATEDIFF(Minute, qs.creation_time, GETDATE()) AS [Age in Cache]
FROM
    sys.dm_exec_query_stats AS qs
CROSS APPLY 
    sys.dm_exec_sql_text(qs.[sql_handle]) AS qt
WHERE
    qt.[dbid] = DB_ID()
AND qt.objectid = OBJECT_ID('StoredProcedureName')
OPTION (RECOMPILE);

查看最常执行的程序：

SELECT
    OBJECT_NAME(qt.objectid)
  , qs.execution_count AS [Execution Count]
  , qs.execution_count / DATEDIFF(Second, qs.creation_time, GETDATE()) AS [Calls/Second]
  , qs.total_worker_time / qs.execution_count AS [AvgWorkerTime]
  , qs.total_worker_time AS [TotalWorkerTime]
  , qs.total_elapsed_time / qs.execution_count AS [AvgElapsedTime]
  , qs.max_logical_reads
  , qs.max_logical_writes
  , qs.total_physical_reads
  , DATEDIFF(Minute, qs.creation_time, GETDATE()) AS [Age in Cache]
FROM
    sys.dm_exec_query_stats AS qs
CROSS APPLY 
    sys.dm_exec_sql_text(qs.[sql_handle]) AS qt
WHERE
    qt.[dbid] = DB_ID()
ORDER BY
    qs.execution_count DESC
OPTION (RECOMPILE);

报告的值是自上次重新启动以来的累积值。如果要在固定时间段内进行测量，请使用以下命令重置等待统计信息。

DBCC SQLPERF("sys.dm_os_wait_stats",CLEAR);

如果您想测量一天中的固定时间跨度，您可以通过代理作业将查询输出提供给表，并且 a) 计算两次运行之间的值或 b) 将等待统计重置为代理作业的最后一步.

或者，捕获分析器跟踪并通过Clear Trace运行它。