SqlServer性能優化，查看CPU、內存占用大的會話及SQL語句

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