sqlserver检测死锁;杀死锁和进程;查看锁信息

http://blog.sina.com.cn/s/blog_9dcdd2020101nf4v.html

sqlserver检测死锁;杀死锁和进程;查看锁信息 (2013-06-09 16:43:03)转载▼
标签： sql 检测死锁 杀死锁和进程 查看锁信息 it    分类： mssql

--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'

        when 4 then '索引'

        when 5 then '表'

        when 6 then '页'

        when 7 then '键'

        when 8 then '扩展盘区'

        when 9 then 'RID（行 ID)'

        when 10 then '应用程序'

    end

    ,对象id=rsc_objid

    ,对象名=b.obj_name

    ,rsc_indid

 from master..syslockinfo a left join #t b on a.req_spid=b.req_spid

go

drop table #t