使用sqlserver作为数据库的应用系统,都避免不了有时候会产生死锁, 死锁出现以后,维护人员或者开发人员大多只会通过sp_who来查找死锁的进程,然后用sp_kill杀掉。利用sp_who_lock这个存储过程,可以很方便的知道哪个进程出现了死锁,出现死锁的问题在哪里.

创建sp_who_lock存储过程

  CREATE procedure sp_who_lock   as     begin       declare @spid int       declare @blk int       declare @count int       declare @index int       declare @lock tinyint       set @lock=0       create table #temp_who_lock      (      id int identity(1,1),      spid int,      blk int      )      if @@error<>0 return @@error      insert into #temp_who_lock(spid,blk)      select 0 ,blocked      from (select * from master..sysprocesses where blocked>0)a      where not exists(select * from master..sysprocesses where a.blocked =spid and blocked>0)      union select spid,blocked from master..sysprocesses where blocked>0      if @@error<>0 return @@error      select @count=count(*),@index=1 from #temp_who_lock      if @@error<>0 return @@error      if @count=0      begin      select '没有阻塞和死锁信息'      return 0      end      while @index<=@count      begin      if exists(select 1 from #temp_who_lock a where id>@index and exists(select 1 from #temp_who_lock where id<=@index and a.blk=spid))      begin       set @lock=1       select @spid=spid,@blk=blk from #temp_who_lock where id=@index       select '引起数据库死锁的是: '+ CAST(@spid AS VARCHAR(10)) + '进程号,其执行的SQL语法如下'       select @spid, @blk      dbcc inputbuffer(@spid)       dbcc inputbuffer(@blk)      end      set @index=@index+1      end      if @lock=0      begin      set @index=1      while @index<=@count      begin       select @spid=spid,@blk=blk from #temp_who_lock where id=@index       if @spid=0       select '引起阻塞的是:'+cast(@blk 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(@blk AS VARCHAR(10)) +'阻塞,其当前进程执行的SQL语法如下'       dbcc inputbuffer(@spid)      dbcc inputbuffer(@blk)       set @index=@index+1      end      end      drop table #temp_who_lock      return 0     end   GO  

在查询分析器中执行:

exec sp_who_lock

直到最后的结果为:**

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