SQL Server慢查询

SELECT
    total_physical_reads  * 8 / 1024 "总物理读(Mb)",
    total_logical_reads * 8 / 1024 "总逻辑读(Mb)",
    total_logical_writes * 8 / 1024 "总逻辑写(Mb)",
    total_worker_time /1000/1000 "总CPU耗时(s)",
    creation_time 初次执行时间,
    last_execution_time 上次执行时间,
    execution_count 总运行次数,
    execution_count / (DATEDIFF(day, creation_time, last_execution_time) + 1) 平均每天运行次数,
    total_logical_writes / execution_count * 8 "平均逻辑写(Kb)",
    total_elapsed_time /1000/1000 "总用时(s)",
    total_elapsed_time / execution_count /1000/1000 "平均耗时(s)",
    SUBSTRING (
        st.text,
        ( qs.statement_start_offset/ 2 ) + 1,
    ( ( CASE statement_end_offset WHEN - 1 THEN DATALENGTH( st.text ) ELSE qs.statement_end_offset END - qs.statement_start_offset ) / 2 ) + 1
    ) AS statement_text
FROM
    sys.dm_exec_query_stats AS qs CROSS APPLY sys.dm_exec_sql_text ( qs.sql_handle ) st
ORDER BY
-- total_elapsed_time desc,
    total_elapsed_time / execution_count DESC;