监控 SQL Server 的运行状况

　　COUNT(*) AS number_of_statements,

　　qs.sql_handle

　　FROM sys.dm_exec_query_stats AS qs

　　GROUP BY qs.sql_handle

　　ORDER BY SUM(qs.total_worker_time) DESC

　　SELECT TOP 50

　　SUM(qs.total_worker_time) AS total_cpu_time,

　　SUM(qs.execution_count) AS total_execution_count,

　　COUNT(*) AS number_of_statements,

　　qs.sql_handle

　　FROM sys.dm_exec_query_stats AS qs

　　GROUP BY qs.sql_handle

　　ORDER BY SUM(qs.total_worker_time) DESC

　　下面的查询显示缓存计划所占用的 CPU 总使用率(带 SQL 文本)。

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　　SELECT

　　total_cpu_time,

　　total_execution_count,

　　number_of_statements,

　　s2.text

　　--(SELECT SUBSTRING(s2.text, statement_start_offset / 2, ((CASE WHEN statement_end_offset = -1 THEN (LEN(CONVERT(NVARCHAR(MAX), s2.text)) * 2) ELSE statement_end_offset END) - statement_start_offset) / 2) ) AS query_text

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