sql server的死锁及处理方法

【转】处理sql server的死锁

--第一篇

--检测死锁

--如果发生死锁了，我们怎么去检测具体发生死锁的是哪条SQL语句或存储过程？

--这时我们可以使用以下存储过程来检测，就可以查出引起死锁的进程和SQL语句。SQL Server自带的系统存储过程sp_who和sp_lock也可以用来查找阻塞和死锁, 但没有这里介绍的方法好用。

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

--杀死锁和进程

--如何去手动的杀死进程和锁？最简单的办法，重新启动服务。但是这里要介绍一个存储过程，通过显式的调用，可以杀死进程和锁。

use master

go

if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[p_killspid]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)

drop procedure [dbo].[p_killspid]

GO

create proc p_killspid

@dbname varchar(200) --要关闭进程的数据库名

as

declare @sql nvarchar(500)

declare @spid nvarchar(20)

declare #tb cursor for

select spid=cast(spid as varchar(20)) from master..sysprocesses where dbid=db_id(@dbname)

open #tb

fetch next from #tb into @spid

while @@fetch_status=0

begin

exec('kill '+@spid)

fetch next from #tb into @spid

end

close #tb

deallocate #tb

go

--用法

exec p_killspid 'newdbpy'

--查看锁信息

--如何查看系统中所有锁的详细信息？在企业管理管理器中，我们可以看到一些进程和锁的信息，这里介绍另外一种方法。

--查看锁信息

create table #t(req_spid int,obj_name sysname)

declare @s nvarchar(4000)

,@rid int,@dbname sysname,@id int,@objname sysname

declare tb cursor for

select distinct req_spid,dbname=db_name(rsc_dbid),rsc_objid

from master..syslockinfo where rsc_type in(4,5)

open tb

fetch next from tb into @rid,@dbname,@id

while @@fetch_status=0

begin

set @s='select @objname=name from ['+@dbname+']..sysobjects where id=@id'

exec sp_executesql @s,N'@objname sysname out,@id int',@objname out,@id

insert into #t values(@rid,@objname)

fetch next from tb into @rid,@dbname,@id

end

close tb

deallocate tb

select 进程id=a.req_spid

,数据库=db_name(rsc_dbid)

,类型=case rsc_type when 1 then 'NULL 资源（未使用）'

when 2 then '数据库'

when 3 then '文件'