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数据库查询超级慢，数据库死锁的查看与解决

2024-08-30 11:11:04   223人阅读

今天帮同事解决问题，页面报“等待的操作过时”，设置断点发现数据库查询语句处异常，检查了数据库一通，发现连接数据库也连接不上了，搜了一圈找到解决办法。留着备用啦

首先查出死锁，可用sql语句
SELECT blocking_session_id ‘阻塞进程的ID‘, wait_duration_ms ‘等待时间(毫秒)‘, session_id ‘(会话ID)‘ FROM sys.dm_os_waiting_tasks

或者创建以下存储过程，查询出来

USE [master]GO/****** Object:  StoredProcedure [dbo].[sp_who_lock]    Script Date: 01/03/2017 10:58:03 ******/SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGOALTER procedure [dbo].[sp_who_lock]asbegindeclare @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 <= @intCountPropertiesbegin-- 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 + 1enddrop table #tmp_lock_whoreturn 0end

通过以上便可查出死锁进程ID，执行 kill 死锁进程ID  即可（kill 63）

数据库查询超级慢，数据库死锁的查看与解决


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