监控 SQL Server 的运行状况

　　FROM

　　(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 --,

　　--MIN(statement_start_offset) AS statement_start_offset,

　　--MAX(statement_end_offset) AS statement_end_offset

　　FROM

　　sys.dm_exec_query_stats AS qs

　　GROUP BY qs.sql_handle

　　ORDER BY SUM(qs.total_worker_time) DESC) AS stats

　　CROSS APPLY sys.dm_exec_sql_text(stats.sql_handle) AS s2

　　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

　　FROM

　　(SELECT TOP 50

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