死锁研究

*--处理死锁

    查看当前进程,或死锁进程,并能自动杀掉死进程

    因为是针对死的,所以如果有死锁进程,只能查看死锁进程
    当然,你可以通过参数控制,不管有没有死锁,都只查看死锁进程

    感谢: caiyunxia,jiangopen 两位提供的参考信息

--邹建 2004.4--*/

/**//*--调用示例

    exec p_lockinfo
--*/
create proc p_lockinfo
@kill_lock_spid bit=1,        --是否杀掉死锁的进程,1 杀掉, 0 仅显示
@show_spid_if_nolock bit=1    --如果没有死锁的进程,是否显示正常进程信息,1 显示,0 不显示
as
set nocount on
declare @count int,@s nvarchar(1000),@i int
select id=identity(int,1,1),标志,
    进程ID=spid,线程ID=kpid,块进程ID=blocked,数据库ID=dbid,
    数据库名=db_name(dbid),用户ID=uid,用户名=loginame,累计CPU时间=cpu,
    登陆时间=login_time,打开事务数=open_tran,    进程状态=status,
    工作站名=hostname,应用程序名=program_name,工作站进程ID=hostprocess,
    域名=nt_domain,网卡地址=net_address
into #t from(
    select 标志='死锁的进程',
        spid,kpid,a.blocked,dbid,uid,loginame,cpu,login_time,open_tran,
        status,hostname,program_name,hostprocess,nt_domain,net_address,
        s1=a.spid,s2=0
    from master..sysprocesses a join (
        select blocked from master..sysprocesses group by blocked
        )b on a.spid=b.blocked where a.blocked=0
    union all
    select '|_牺牲品_>',
        spid,kpid,blocked,dbid,uid,loginame,cpu,login_time,open_tran,
        status,hostname,program_name,hostprocess,nt_domain,net_address,
        s1=blocked,s2=1
    from master..sysprocesses a where blocked<>0
)a order by s1,s2

select @count=@@rowcount,@i=1

if @count=0 and @show_spid_if_nolock=1
begin
    insert #t
    select 标志='正常的进程',
        spid,kpid,blocked,dbid,db_name(dbid),uid,loginame,cpu,login_time,
        open_tran,status,hostname,program_name,hostprocess,nt_domain,net_address
    from master..sysprocesses
    set @count=@@rowcount
end

if @count>0
begin
    create table #t1(id int identity(1,1),a nvarchar(30),b Int,EventInfo nvarchar(255))
    if @kill_lock_spid=1
    begin
        declare @spid varchar(10),@标志 varchar(10)
        while @i<=@count
        begin
            select @spid=进程ID,@标志=标志 from #t where id=@i
            insert #t1 exec('dbcc inputbuffer('+@spid+')')
            if @@rowcount=0 insert #t1(a) values(null)
            if @标志='死锁的进程' exec('kill '+@spid)
            set @i=@i+1
        end
    end
    else
        while @i<=@count
        begin
            select @s='dbcc inputbuffer('+cast(进程ID as varchar)+')' from #t where id=@i
            insert #t1 exec(@s)
            if @@rowcount=0 insert #t1(a) values(null)
            set @i=@i+1
        end
    select a.*,进程的SQL语句=b.EventInfo
    from #t a join #t1 b on a.id=b.id
    order by 进程ID
end
set nocount off

GO

　　

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
/**//***************************************************************************
//  创建 : fengyu  邮件 : maggiefengyu@tom.com  日期 :2004-04-30
//  修改 : 从http://www.csdn.net/develop/Read_Article.asp?id=26566学习到并改写  
//  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