Sql Server死锁和阻塞的监控和处理
1.查询是否有资源占用:
一、sys.dm_tran_locks表中的request_session_id(spid)为-2时,证明是分布式事务锁,即中 间件操作了锁定。
二、查询表锁并删除
SELECT request_session_id spid,OBJECT_NAME (resource_associated_entity_id)tableName
FROM sys.dm_tran_locks
WHERE resource_type='OBJECT'
KILL 100 spid
三、查询行锁(RID)、页锁(PAGE)、索引行锁(KEY)
1、根据表名查询表中的行、页、索引锁
SELECT request_session_id,request_owner_guid,*
FROM sys.partitions a
INNER JOIN sys.dm_tran_locks b ON a.hobt_id=b.resource_associated_entity_id
WHERE object_id=OBJECT_ID('SyncLogs')
2、分布式锁删除
KILL 'B7443ED4-A596-482A-899A-775845D2A29C' request_owner_guid
3、非分布式锁删除
kill request_session_id
2建存储过程看是否存在进程阻塞
存储过程:
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
GO
调用:
EXEC sp_who_lock
3开启sql Server的跟踪,查到具体的阻塞进程进行分析
选择默认模版
选择事件时,加上LOCK的相关事件
根据第二步查到的阻塞进程号,到这里找到相应的SQL,具体分析 :
1. 加索引
2. Select 加
with(nolock)
3. Where 条件尽量以主键ID为条件
4. 大数据量提交时,最好分批次提交,300一次(需要测试出最佳值)具体业务具体分析