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The user connections option specifies the maximum number of simultaneous user connections that are allowed on an instance of SQL Server. The actual number of user connections allowed also depends on the version of SQL Server that you are using, and also the limits of your application or applications and hardware.
SQL Server allows a maximum of 32, user connections. Because user connections is a dynamic self-configuring option, SQL Server adjusts the maximum number of user connections automatically as needed, up to the maximum value allowable.
For example, if only 10 users are logged in, 10 user connection objects are allocated. In most cases, you do not have to change the value for this option. The default is 0, which means that the maximum 32, user connections are allowed. After you configure the user connections option.
This option is an advanced option and should be changed only by an experienced database administrator or certified SQL Server professional. Using the user connections option helps avoid overloading the server with too many concurrent connections. You can estimate the number of connections based on system and user requirements.
For example, on a system with many users, each user would not usually require a unique connection. Connections can be shared among users. Users running OLE DB applications need a connection for each open connection object, users running Open Database Connectivity ODBC applications need a connection for each active connection handle in the application, and users running DB-Library applications need one connection for each process started that calls the DB-Library dbopen function.
If you must use this option, do not set the value too high, because each connection has overhead regardless of whether the connection is being used. If you exceed the maximum number of user connections, you receive an error message and are not able to connect until another connection becomes available.
Under Connections , in the Max number of concurrent connections box, type or select a value from 0 through to set the maximum number of users that are allowed to connect simultaneously to the instance of SQL Server. Copy and paste the following example into the query window and click Execute.
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In This Topic Before you begin: Recommendations Security To configure the user connections option, using: After you configure the user connections option Before You Begin Recommendations This option is an advanced option and should be changed only by an experienced database administrator or certified SQL Server professional.
Important If you must use this option, do not set the value too high, because each connection has overhead regardless of whether the connection is being used. Note The feedback system for this content will be changing soon.