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SQL设置SQLServer最大连接数查询语句

Jun 07, 2016 pm 03:40 PM
sql sqlserver maximum Inquire set up statement connect

设置最大连接数 下面的T-SQL 语句可以配置SQL Server 允许的并发用户连接的最大数目。 exec sp_configure 'show advanced options', 1 exec sp_configure 'user connections', 100 第一句用以表示显示sp_configure系统存储过程高级选项,使用user connection

设置最大连接数
 
下面的T-SQL 语句可以配置SQL Server 允许的并发用户连接的最大数目。
 
exec sp_configure 'show advanced options', 1
exec sp_configure 'user connections', 100
第一句用以表示显示sp_configure 系统存储过程高级选项,使用user connections 时,要求show advanced options 值为1。
 
第二句配置最大连接数为100,0 表示不限制,但不表示无限,后面将谈谈。
 
也可以在企业管理器中配置,在企业管理器中,可以在实例上点右键->“属性”->“连接”里面更改。
 
需要重新启动SQL Server,该值才会生效。
 
@@max_connections
 
select @@max_connections
它总是返回32767,它并不是指上面设置的user connections,实际上它表示user connections 最大可设置为多少。由于它的最大值是32767,那么user connections 为0 时,最大连接数也就是32767 了,并不是无限。
 
默认情况下user connections 值是0,也就是说默认情况下SQL Server 的最大连接数是32767。
 
获得当前设置的最大连接数:
 
 
select value from  master.dbo.sysconfigures where [config]=103 

如何监测SQLServer的连接数

 

/*查询连接数*/
select loginame,count(1) as Nums
from sys.sysprocesses
group by loginame
order by 2 desc

select spid,ecid,status,loginame,hostname,cmd,request_id
from sys.sysprocesses where loginame='' and hostname=''

方法二:

SP_WHO 'loginName'
loginName 是当然登陆Sql的用户名,一般程序里面都会使用一个username来登陆SQL这样通过这个用户名就能查看到此用户名登陆之后占用的连接了。
如果不写loginName,那么返回的就是所有的连接。

既然连接数是可预测、可监测的,那么它就是可度量的,那么我们就可以根据实际情况来评估或测试程序的并发放量了。

 

有了这些,相信以上的困惑应该可以解开了吧。 

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