SQL Server---進程死結查殺,sqlserver---

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SQL Server---進程死結查殺,sqlserver---
SQLServer---進程死結查殺

         最近在某學院評教系統中遇到了這麼一個情況,當機房人數達到上限時,評教過程中就遇到了無法提交的情況。遇到問題後大家第一時間發現了是由於死結造成的,於是在網上找了一些資料發現了SQL Server中有關於資料庫進程死結查殺的預存程序,如下:(分享給大家)

CREATE proc [dbo].[p_lockinfo] @kill_lock_spid bit=1, --是否殺掉死結的進程,1 殺掉,0 僅顯示 @show_spid_if_nolock bit=1 --如果沒有死結的進程,是否顯示正常進程資訊,1 顯示,0 不顯示 as  declare @count int,@s nvarchar(1000),@i int select id=identity(int,1,1),標誌, 進程ID=spid,線程ID=kpid,塊進程ID=blocked,資料庫ID=dbid, 資料庫名=db_name(dbid),使用者ID=uid,使用者名稱=loginame,累計CPU時間=cpu, 登陸時間=login_time,開啟事務數=open_tran, 進程狀態=status, 工作站名=hostname,應用程式名稱=program_name,工作站進程ID=hostprocess, 網域名稱=nt_domain,網卡地址=net_address into #t from( select 標誌='死結的進程', 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=0from master..sysprocesses a join( select blocked frommaster..sysprocesses group by blocked )b on a.spid=b.blocked where a.blocked=0union all select '|_犧牲品_>', spid,kpid,blocked,dbid,uid,loginame,cpu,login_time,open_tran, status,hostname,program_name,hostprocess,nt_domain,net_address, s1=blocked,s2=1from master..sysprocesses a where blocked<>0 )a order by s1,s2  select @count=@@rowcount,@i=1 if @count=0 and @show_spid_if_nolock=1begin insert #t select 標誌='正常的進程', 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=1begin declare @spid varchar(10),@標誌 varchar(10) while @i<=@count begin    select @spid=進程ID,@標誌=標誌 from #t where  id=@i    insert #t1 exec('dbcc inputbuffer('+@spid+')')    if @標誌='死結的進程' exec('kill'+@spid)    set @i=@i+1 end end else while @i<=@count begin    select @s='dbcc inputbuffer('+cast(進程ID as varchar)+')' from #t where       id=@i    insert #t1 exec(@s)    set @i=@i+1 end select a.*,進程的SQL語句=b.EventInfo from #t a join #t1 b on a.id=b.id end 

         這次造成死結的原因是:使用SqlServer的時候發現在高並發情況下,頻繁更新和頻繁查詢引發死結。

         解決方案是:在被頻繁操作的那張表上添加非叢集索引。

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