Sqlserver 查性能语句

--CPU相关视图  
SELECT * FROM sys.dm_os_sys_info  
SELECT * FROM sys.dm_exec_sessions  
SELECT * FROM sys.sysprocesses  
SELECT * FROM sys.dm_os_tasks  
SELECT * FROM sys.dm_os_workers  
SELECT * FROM sys.dm_os_threads  
SELECT * FROM sys.dm_os_schedulers  
SELECT * FROM sys.dm_os_memory_objects  
SELECT * FROM sys.dm_os_nodes  
SELECT * FROM sys.dm_os_memory_nodes  
  
exec sp_configure 'max degree of parallelism'--系统默认并行度  
exec sp_configure 'cost threshold for parallelism' --并发阈值  
exec sp_configure 'max worker threads'--系统最大工作线程数  
exec sp_configure 'affinity mask' --CPU关联  
  
--数据库系统 cpu，线程 数量  
select max_workers_count,scheduler_count,cpu_count,hyperthread_ratio  
,(hyperthread_ratio/cpu_count) AS physical_cpu_count  
,(max_workers_count/scheduler_count) AS workers_per_scheduler_limit  
from sys.dm_os_sys_info  
  
  
--执行的线程所遇到的所有等待的相关信息  
SELECT TOP 10 wait_type,waiting_tasks_count,signal_wait_time_ms   
FROM sys.dm_os_wait_stats ORDER BY signal_wait_time_ms DESC  
  
--正在等待某些资源的任务的等待队列的信息  
SELECT TOP 10 wait_type,wait_duration_ms,session_id,blocking_session_id   
FROM sys.dm_os_waiting_tasks ORDER BY wait_duration_ms DESC  
  
  
--CPU或调度器当前分配的工作情况  
SELECT scheduler_id,cpu_id,status,is_idle  
,current_tasks_count AS 当前任务数           --在等待或运行的任务  
,runnable_tasks_count AS 等待调度线程数        --已分配