查看SQLServer最耗資源時間的SQL語句

1.找出執行時間最長的10條SQL（適用於SQL SERVER 2005及其以上版本）

SELECT top 10  
    (total_elapsed_time / execution_count)/1000 N'平均時間ms'  
    ,total_elapsed_time/1000 N'總花費時間ms'  
    ,total_worker_time/1000 N'所用的CPU總時間ms'  
    ,total_physical_reads N'物理讀取總次數'  
    ,total_logical_reads/execution_count N'每次邏輯讀次數'  
    ,total_logical_reads N'邏輯讀取總次數'  
    ,total_logical_writes N'邏輯寫入總次數'  
    ,execution_count N'執行次數'  
    ,creation_time N'語句編譯時間'  
    ,last_execution_time N'上次執行時間'  
    ,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'執行語句'  
    ,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;  


若是想對SQL做篩選，可將
not like '%fetch%'  換成  like '%user%'就能夠找出SQL語句中含有user關鍵字的SQL

 

2 找出執行最慢的SQL語句（適用於SQL SERVER 2005及其以上版本）

SELECT
    (total_elapsed_time / execution_count)/1000 N'平均時間ms'
    ,total_elapsed_time/1000 N'總花費時間ms'
    ,total_worker_time/1000 N'所用的CPU總時間ms'
    ,total_physical_reads N'物理讀取總次數'
    ,total_logical_reads/execution_count N'每次邏輯讀次數'
    ,total_logical_reads N'邏輯讀取總次數'
    ,total_logical_writes N'邏輯寫入總次數'
    ,execution_count N'執行次數'
    ,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'執行語句'
    ,creation_time N'語句編譯時間'
    ,last_execution_time N'上次執行時間'
    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 找出最耗時的前N條T-SQL語句  （適用於SQL SERVER 2005及其以上版本）

--給N賦初值爲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  
          
/* 結果格式以下  
text     total_worker_time  execution_count   sql_count  
-------- ------------------ ----------------- ---------  
內容略  
*/  

 

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

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最多的前個SQL  （SQL SERVER 2008或以上版本）

SELECT TOP 20
    total_worker_time/1000 AS [總消耗CPU 時間(ms)],execution_count [運行次數],
    qs.total_worker_time/qs.execution_count/1000 AS [平均消耗CPU 時間(ms)],
    last_execution_time AS [最後一次執行時間],min_worker_time /1000 AS [最小執行時間(ms)],
    max_worker_time /1000 AS [最大執行時間(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的語法], qt.text [完整語法],
    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 總耗CPU最多的前個SQL （SQL SERVER 2008或以上版本）

SELECT TOP 20
    total_worker_time/1000 AS [總消耗CPU 時間(ms)],execution_count [運行次數], qs.total_worker_time/qs.execution_count/1000 AS [平均消耗CPU 時間(ms)], last_execution_time AS [最後一次執行時間],max_worker_time /1000 AS [最大執行時間(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的語法], qt.text [完整語法], 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