I/O 비용이 많이 드는 쿼리 조회

SELECT TOP 20 SUBSTRING(qt.text, (qs.statement_start_offset/2)+1,

        ((CASE qs.statement_end_offset

          WHEN -1 THEN DATALENGTH(qt.text)

         ELSE qs.statement_end_offset

         END - qs.statement_start_offset)/2)+1),

        qs.execution_count,

        qs.total_logical_reads, qs.last_logical_reads,

        qs.min_logical_reads, qs.max_logical_reads,

        qs.total_elapsed_time, qs.last_elapsed_time,

        qs.min_elapsed_time, qs.max_elapsed_time,

        qs.last_execution_time,

        qp.query_plan

FROM sys.dm_exec_query_stats qs

        CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) qt

        CROSS APPLY sys.dm_exec_query_plan(qs.plan_handle) qp

WHERE qt.encrypted=0

ORDER BY execution_count DESC, qs.total_logical_reads DESC







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