SqlServer 資源占用情況[簡易]

1、查看CPU占用量最高的會話及SQL語句

select spid,cmd,cpu,physical_io,memusage,
(select top 1 [text] from ::fn_get_sql(sql_handle)) sql_text
from master..sysprocesses order by cpu desc,physical_io desc

2、查看緩存重用次數少，內存占用大的SQL語句　

SELECT TOP 100 usecounts, objtype, p.size_in_bytes,[sql].[text] 
FROM sys.dm_exec_cached_plans p OUTER APPLY sys.dm_exec_sql_text (p.plan_handle) sql 
ORDER BY usecounts,p.size_in_bytes  desc

3、執行最慢的SQL語句

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;

4、總耗CPU最多的前個SQL

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 [最后一次執行時間],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

5、平均耗CPU最多的前個SQL

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 [最后一次執行時間],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