mssql 清理死锁

-存储过程

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

用法如下:

exec p_killspid   'db'