小知识，大挑战！本文正在参与“程序员必备小知识”创作活动。
1、查询当前数据库正在执行中的sql语句
SELECT [Spid] = session_Id, ecid, [Database] = DB_NAME(sp.dbid),
[User] = nt_username,
[Status] = er.status,
[Wait] = wait_type,
[Individual Query] = SUBSTRING(qt.text, er.statement_start_offset / 2, (CASE WHEN er.statement_end_offset = - 1 THEN LEN(CONVERT(NVARCHAR(MAX), qt.text)) * 2 ELSE er.statement_end_offset END - er.statement_start_offset) / 2),
[Parent Query] = qt.text,
Program = program_name, Hostname,
nt_domain, start_time
FROM sys.dm_exec_requests er INNER JOIN sys.sysprocesses sp ON er.session_id = sp.spid
CROSS APPLY sys.dm_exec_sql_text(er.sql_handle) AS qt WHERE session_Id > 50 /* Ignore system spids.*/ AND session_Id NOT IN (@@SPID)
2、被锁定的事务
select spid 进程,STATUS 状态, 登录帐号=SUBSTRING(SUSER_SNAME(sid),1,30)
,用户机器名称=SUBSTRING(hostname,1,12)
,是否被锁住=convert(char(3),blocked)
,数据库名称=SUBSTRING(db_name(dbid),1,20),cmd 命令,waittype as 等待类型
,last_batch 最后批处理时间,open_tran 未提交事务的数量
from master.sys.sysprocesses
Where status='sleeping' and waittype=0x0000 and open_tran>0
3、查询卡顿的数据库
SELECT SPID=p.spid,
DBName = convert(CHAR(20),d.name),
ProgramName = program_name,
LoginName = convert(CHAR(20),l.name),
HostName = convert(CHAR(20),hostname),
Status = p.status,
BlockedBy = p.blocked,
LoginTime = login_time,
QUERY = CAST(TEXT AS VARCHAR(MAX))
FROM MASTER.dbo.sysprocesses p
INNER JOIN MASTER.dbo.sysdatabases d
ON p.dbid = d.dbid
INNER JOIN MASTER.dbo.syslogins l
ON p.sid = l.sid
CROSS APPLY sys.dm_exec_sql_text(sql_handle)
WHERE p.blocked = 0
AND EXISTS (SELECT 1
FROM MASTER..sysprocesses p1
WHERE p1.blocked = p.spid)
4、存储过程查询具体的死锁，阻塞中的sql语句
- 新建存储过程
create procedure [dbo].[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
GO
-
然后执行存储过程查看阻塞中的sql
exec sp_who_lock -
结束阻塞的进程
kill 进程号
