找到死锁与阻塞的原因的方法

if exists (select * from dbo.sysobjects

where id = object_id(N'[dbo].[sp_who_lock]')

and OBJECTPROPERTY(id, N'IsProcedure') = 1)

drop procedure [dbo].[sp_who_lock]

GO

--说明 : 查看数据库里阻塞和死锁情况

use master

go

create procedure sp_who_lock

as

begin

declare @spid int,@bl int,

@intTransactionCountOnEntry int,

@intRowcount int,

@intCountProperties int,

@intCounter int

create table #tmp_lock_who (

id int identity(1,1),

spid smallint,

bl smallint)

IF @@ERROR<>0 RETURN @@ERROR

insert into #tmp_lock_who(spid,bl) select 0 ,blocked

from (select * from sysprocesses where blocked>0 ) a

where not exists(select * from (select * from sysprocesses

where blocked>0 ) b

where a.blocked=spid)

union select spid,blocked from sysprocesses where blocked>0

IF @@ERROR<>0 RETURN @@ERROR

-- 找到临时表的记录数

select @intCountProperties = Count(*),@intCounter = 1

from #tmp_lock_who

IF @@ERROR<>0 RETURN @@ERROR

if @intCountProperties=0

select '现在没有阻塞和死锁信息' as message

-- 循环开始

while @intCounter <= @intCountProperties

begin

-- 取第一条记录

select @spid = spid,@bl = bl

from #tmp_lock_who where Id = @intCounter

begin

if @spid =0

select '引起数据库死锁的是: '+ CAST(@bl AS VARCHAR(10))

+ '进程号,其执行的SQL语法如下'

else

select '进程号SPID：'+ CAST(@spid AS VARCHAR(10))+ '被'

+ '进程号SPID：'+ CAST(@bl AS VARCHAR(10)) +'阻塞,其当前进程执行的SQL语法如下'

DBCC INPUTBUFFER (@bl )

end

-- 循环指针下移

set @intCounter = @intCounter + 1

end

drop table #tmp_lock_who

return 0

end

--需要的时候直接调用,就可以查出引起死锁的进程和SQL语句.

exec sp_who_lock

发现问题后：就进行语句的优化，避免来再次出现上面现象。Profiler跟踪时主要是看：TextData，Applicationname，Username，Loginname，CpU，Read and write

Duration(这个很重要),spid