SQL设置SQLServer最大连接数查询语句
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。

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics



For objects with the same name that already exist in the SQL Server database, the following steps need to be taken: Confirm the object type (table, view, stored procedure). IF NOT EXISTS can be used to skip creation if the object is empty. If the object has data, use a different name or modify the structure. Use DROP to delete existing objects (use caution, backup recommended). Check for schema changes to make sure there are no references to deleted or renamed objects.

The import steps are as follows: Copy the MDF file to SQL Server's data directory (usually C:\Program Files\Microsoft SQL Server\MSSQL\DATA). In SQL Server Management Studio (SSMS), open the database and select Attach. Click the Add button and select the MDF file. Confirm the database name and click the OK button.

HQL and SQL are compared in the Hibernate framework: HQL (1. Object-oriented syntax, 2. Database-independent queries, 3. Type safety), while SQL directly operates the database (1. Database-independent standards, 2. Complex executable queries and data manipulation).

When the SQL Server service fails to start, here are some steps to resolve: Check the error log to determine the root cause. Make sure the service account has permission to start the service. Check whether dependency services are running. Disable antivirus software. Repair SQL Server installation. If the repair does not work, reinstall SQL Server.

To view the SQL Server port number: Open SSMS and connect to the server. Find the server name in Object Explorer, right-click it and select Properties. In the Connection tab, view the TCP Port field.

SQL Server database files are usually stored in the following default location: Windows: C:\Program Files\Microsoft SQL Server\MSSQL\DATALinux: /var/opt/mssql/data The database file location can be customized by modifying the database file path setting.

If you accidentally delete a SQL Server database, you can take the following steps to recover: stop database activity; back up log files; check database logs; recovery options: restore from backup; restore from transaction log; use DBCC CHECKDB; use third-party tools. Please back up your database regularly and enable transaction logging to prevent data loss.

If the SQL Server installation fails, you can clean it up by following these steps: Uninstall SQL Server Delete registry keys Delete files and folders Restart the computer
