查看SQLServer最耗资源时间的SQL语句

1.找出执行时间最长的10条SQL(适用于SQL SERVER 2005及其以上版本)


SELECT top 10  
    (total_elapsed_time / execution_count)/1000 N'平均时间ms'  
    ,total_elapsed_time/1000 N'总花费时间ms'  
    ,total_worker_time/1000 N'所用的CPU总时间ms'  
    ,total_physical_reads N'物理读取总次数'  
    ,total_logical_reads/execution_count N'每次逻辑读次数'  
    ,total_logical_reads N'逻辑读取总次数'  
    ,total_logical_writes N'逻辑写入总次数'  
    ,execution_count N'执行次数'  
    ,creation_time N'语句编译时间'  
    ,last_execution_time N'上次执行时间'  
    ,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  
    ) N'执行语句'  
    ,qp.query_plan  
FROM  sys.dm_exec_query_stats AS qs 
CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) st 
CROSS APPLY sys.dm_exec_query_plan(qs.plan_handle) qp  
WHERE  
    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  
    ) not like '%fetch%'  
ORDER BY  total_elapsed_time / execution_count DESC;  


如果想对SQL作筛选,可将
not like '%fetch%'  换成  like '%user%'就可以找出SQL语句中含有user关键字的SQL

 

2 找出执行最慢的SQL语句(适用于SQL SERVER 2005及其以上版本)


SELECT
    (total_elapsed_time / execution_count)/1000 N'平均时间ms'
    ,total_elapsed_time/1000 N'总花费时间ms'
    ,total_worker_time/1000 N'所用的CPU总时间ms'
    ,total_physical_reads N'物理读取总次数'
    ,total_logical_reads/execution_count N'每次逻辑读次数'
    ,total_logical_reads N'逻辑读取总次数'
    ,total_logical_writes N'逻辑写入总次数'
    ,execution_count N'执行次数'
    ,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) N'执行语句'
    ,creation_time N'语句编译时间'
    ,last_execution_time N'上次执行时间'
    FROM
    sys.dm_exec_query_stats AS qs CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) st
WHERE
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) not like '�tch%'
ORDER BY
total_elapsed_time / execution_count DESC;

 

 3 找出最耗时的前N条T-SQL语句  (适用于SQL SERVER 2005及其以上版本)


--给N赋初值为30  
declare @n int set @n=30   
  
;with maco as   
(     
    select top (@n)  
        plan_handle,  
        sum(total_worker_time) as total_worker_time ,  
        sum(execution_count) as execution_count ,  
        count(1) as sql_count  
    from sys.dm_exec_query_stats group by plan_handle  
    order by sum(total_worker_time) desc  
)  
select  t.text ,  
        a.total_worker_time ,  
        a.execution_count ,  
        a.sql_count  
from    maco a  
        cross apply sys.dm_exec_sql_text(plan_handle) t  
          
/* 结果格式如下  
text     total_worker_time  execution_count   sql_count  
-------- ------------------ ----------------- ---------  
内容略  
*/  

 

 4 平均耗CPU最多的前个SQL (SQL SERVER 2005以上版本)


SELECT TOP 5 total_worker_time / execution_count AS [Avg CPU Time],  
    SUBSTRING(st.text, (qs.statement_start_offset/2)+1,   
        ((CASE qs.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) AS st   
 ORDER BY total_worker_time/execution_count DESC  

  

5 平均耗CPU最多的前个SQL  (SQL SERVER 2008或以上版本)


SELECT TOP 20
    total_worker_time/1000 AS [总消耗CPU 时间(ms)],execution_count [运行次数],
    qs.total_worker_time/qs.execution_count/1000 AS [平均消耗CPU 时间(ms)],
    last_execution_time AS [最后一次执行时间],min_worker_time /1000 AS [最小执行时间(ms)],
    max_worker_time /1000 AS [最大执行时间(ms)],
    SUBSTRING(qt.text,qs.statement_start_offset/2+1, 
        (CASE WHEN qs.statement_end_offset = -1 
        THEN DATALENGTH(qt.text) 
        ELSE qs.statement_end_offset END -qs.statement_start_offset)/2 + 1) 
    AS [使用CPU的语法], qt.text [完整语法],
    qt.dbid, dbname=db_name(qt.dbid),
    qt.objectid,object_name(qt.objectid,qt.dbid) ObjectName
FROM sys.dm_exec_query_stats qs WITH(nolock)
CROSS apply sys.dm_exec_sql_text(qs.sql_handle) AS qt
WHERE  execution_count>1
ORDER BY (qs.total_worker_time/qs.execution_count/1000) DESC

 

6 总耗CPU最多的前个SQL (SQL SERVER 2008以上版本)


SELECT TOP 20
    total_worker_time/1000 AS [总消耗CPU 时间(ms)],execution_count [运行次数], qs.total_worker_time/qs.execution_count/1000 AS [平均消耗CPU 时间(ms)], last_execution_time AS [最后一次执行时间],max_worker_time /1000 AS [最大执行时间(ms)], SUBSTRING(qt.text,qs.statement_start_offset/2+1, (CASE WHEN qs.statement_end_offset = -1 THEN DATALENGTH(qt.text) ELSE qs.statement_end_offset END -qs.statement_start_offset)/2 + 1) AS [使用CPU的语法], qt.text [完整语法], qt.dbid, dbname=db_name(qt.dbid), qt.objectid,object_name(qt.objectid,qt.dbid) ObjectName FROM sys.dm_exec_query_stats qs WITH(nolock) CROSS apply sys.dm_exec_sql_text(qs.sql_handle) AS qt WHERE execution_count>1 ORDER BY total_worker_time DESC
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