[英]How to Clear down Query Execution Statistics in SQL Server 2005/2008
基於使用從這篇文章獲得的這個非常有用的SQL獲取查詢執行統計信息最常執行的存儲過程 - 堆棧溢出 :
SELECT TOP 100
qt.TEXT AS 'SP Name',
SUBSTRING(qt.text, qs.statement_start_offset/2, CASE WHEN (qs.statement_end_offset = -1) THEN LEN(qt.text) ELSE (qs.statement_end_offset - qs.statement_start_offset)/2 END) AS actual_query,
qs.execution_count AS 'Execution Count',
qs.total_worker_time/qs.execution_count AS 'AvgWorkerTime',
qs.total_worker_time AS 'TotalWorkerTime',
qs.total_physical_reads AS 'PhysicalReads',
qs.creation_time 'CreationTime',
qs.execution_count/DATEDIFF(Second, qs.creation_time, GETDATE()) AS 'Calls/Second'
FROM sys.dm_exec_query_stats AS qs
CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) AS qt
WHERE qt.dbid = (SELECT dbid
FROM sys.sysdatabases
WHERE name = 'BSP')
ORDER BY qs.total_worker_time/qs.execution_count DESC
我如何完全清除這些執行統計信息並從頭開始?
這將特別有用,因為開發錯誤和測試已經導致例程被調用通常很多次,從而無視真實的使用級別。
DBCC FREEPROCCACHE
DBCC DROPCLEANBUFFERS
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