使用sqlserver作为数据库的应用系统,都避免不了有时候会产生死锁, 死锁出现以后,维护人员或者开发人员大多只会通过sp_who来查找死锁的进程,然后用sp_kill杀掉。利用sp_who_lock这个存储过程,可以很方便的知道哪个进程出现了死锁,出现死锁的问题在哪里.
创建sp_who_lock存储过程
CREATE procedure sp_who_lock
as begin declare @spid
int declare @blk
int declare @ count int declare @ index int declare @lock
tinyint set @lock=0
create table #temp_who_lock
(
id
int identity(1,1),
spid
int ,
blk
int )
if
@@error<>0 return @@error
insert into #temp_who_lock(spid,blk)
select 0
,blocked from ( select *
from master..sysprocesses
where blocked>0)a
where not exists( select *
from master..sysprocesses
where a.blocked
=spid and blocked>0)
union select spid,blocked
from master..sysprocesses
where blocked>0
if
@@error<>0 return @@error
select @ count = count (*),@ index =1
from #temp_who_lock
if
@@error<>0 return @@error
if
@ count =0
begin select '没有阻塞和死锁信息' return 0
end while
@ index <=@ count begin if
exists( select 1
from #temp_who_lock
a where id>@ index and exists( select 1
from #temp_who_lock
where id<=@ index and a.blk=spid))
begin set @lock=1
select @spid=spid,@blk=blk
from #temp_who_lock
where id=@ index select '引起数据库死锁的是:
' +
CAST (@spid
AS VARCHAR (10))
+ '进程号,其执行的SQL语法如下' select @spid,
@blk dbcc
inputbuffer(@spid) dbcc
inputbuffer(@blk) end set @ index =@ index +1
end if
@lock=0 begin set @ index =1
while
@ index <=@ count begin select @spid=spid,@blk=blk
from #temp_who_lock
where id=@ index if
@spid=0 select '引起阻塞的是:' + cast (@blk
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 (@blk
AS VARCHAR (10))
+ '阻塞,其当前进程执行的SQL语法如下' dbcc
inputbuffer(@spid) dbcc
inputbuffer(@blk) set @ index =@ index +1
end end drop table #temp_who_lock
return 0
end GO |
在查询分析器中执行:
exec sp_who_lock
直到最后的结果为: