• 查询sql执行速度


      with QS as(  
        select cp.objtype as object_type  
              ,db_name(st.dbid)as [database]  
              ,object_schema_name(st.objectid,st.dbid)as [schema]  
              ,object_name(st.objectid,st.dbid)as [object]  
              ,convert(char(16),qs.creation_time,120)as plan_creation  
              ,convert(char(16),qs.last_execution_time,120)as last_execution  
              ,qs.plan_generation_num  
              ,qs.execution_count  
              ,qs.total_worker_time  
              ,qs.total_physical_reads  
              ,qs.total_logical_writes  
              ,qs.total_logical_reads  
              ,qs.total_elapsed_time/(1000000*qs.execution_count)as avg_elapesd_seconds  
              ,qs.total_worker_time/qs.execution_count as avg_cpu_cost  
              ,qs.total_logical_reads/qs.execution_count as avg_logical_reads  
              ,qs.total_logical_writes/qs.execution_count as avg_logical_writes  
              ,qs.total_physical_reads/qs.execution_count as avg_physical_reads  
              ,st.text  
              ,qp.query_plan  
        from sys.dm_exec_query_stats qs  
             join sys.dm_exec_cached_plans cp on cp.plan_handle=qs.plan_handle  
             cross apply sys.dm_exec_sql_text(sql_handle)as st  
             cross apply sys.dm_exec_query_plan(qs.plan_handle)as qp  
        where 1=1  
        --and cp.objtype='Proc'                 --对象类型  
        --and db_name(st.dbid)='GprsRun'        --数据库  
        --and st.text not like '%时间%' and st.text not like '%@queryStr%'        --查询字符串  
        --and qs.execution_count>100         --执行次数  
        --and qs.total_worker_time>100           --cpu总时间      
        --and qs.total_physical_reads>100        --物理读次数  
        --and qs.total_logical_writes>100        --逻辑写次数  
        --and qs.total_logical_reads>100     --逻辑读次数  
    )  
     
    select *, '执行次数最多的' type from (select top 5 * from QS order by execution_count desc)a               --执行次数最多的  
    union all  
    select *, '执行时间最长的' type from (select top 5 * from QS order by total_worker_time desc)a             --执行时间最长的  
    union all  
    select *, '物理读次数最多的' type from (select top 5 * from QS order by total_physical_reads desc)a         --物理读次数最多的  
    union all  
    select *, '逻辑写次数最多的' type from (select top 5 * from QS order by total_logical_writes desc)a         --逻辑写次数最多的  
    union all  
    select *, '逻辑读次数最多的' type from (select top 5 * from QS order by total_logical_reads desc)a          --逻辑读次数最多的  
    union all  
    select *, '平均cpu时间最长的' type from (select top 5 * from QS order by avg_cpu_cost desc)a                   --平均cpu时间最长的  
    union all  
    select *, '平均逻辑读最多的' type from (select top 5 * from QS order by avg_logical_reads desc)a                --平均逻辑读最多的  
    union all  
    select *, '平均逻辑写最多的' type from (select top 5 * from QS order by avg_logical_writes desc)a           --平均逻辑写最多的  
    union all  
    select *, '平均物理写最多的' type from (select top 5 * from QS order by avg_physical_reads desc)a           --平均物理写最多的  
    order by text 

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  • 原文地址:https://www.cnblogs.com/toSeeMyDream/p/4203648.html
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