--每秒死锁数量
SELECT *
FROM sys.dm_os_performance_counters
WHERE counter_name LIKE ‘Number of Deadlocksc%‘;
--查询当前阻塞
WITH CTE_SID ( BSID, SID, sql_handle )
AS ( SELECT blocking_session_id ,
session_id ,
sql_handle
FROM sys.dm_exec_requests
WHERE blocking_session_id <> 0
UNION ALL
SELECT A.blocking_session_id ,
A.session_id ,
A.sql_handle
FROM sys.dm_exec_requests A
JOIN CTE_SID B ON A.SESSION_ID = B.BSID
)
SELECT C.BSID ,
C.SID ,
S.login_name ,
S.host_name ,
S.status ,
S.cpu_time ,
S.memory_usage ,
S.last_request_start_time ,
S.last_request_end_time ,
S.logical_reads ,
S.row_count ,
q.text
FROM CTE_SID C
JOIN sys.dm_exec_sessions S ON C.sid = s.session_id
CROSS APPLY sys.dm_exec_sql_text(C.sql_handle) Q
ORDER BY sid
在压力测试过程中，不间断的按F5键执行上面的SQL语句，如果出现死锁或者堵塞现象，就会在执行结果中罗列出来。如果每次连续执行SQL，都有死锁或者堵塞出现，说明死锁或者堵塞的比较严重。
执行最慢的SQL语句
SELECT
(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
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;
--总耗CPU最多的前个SQL:
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],
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
--平均耗CPU最多的前个SQL:
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],min_worker_time /1000 AS [最小执行时间(ms)],
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],
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
