SQL Server性能查询语句

查询CPU耗时

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],
    dbname=db_name(qt.dbid),
    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

 查询sql耗时

SELECT  top 50
    (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  creation_time >'2023-08-22 15:00:00.000' and
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;