What is the maximum number of connections in mysql

The maximum number of MySQL connections refers to the maximum number of client connections that the MySQL database server can accept at the same time. It is defined by the max_connections parameter in the configuration file. When the maximum number of connections is reached, new connection requests will be rejected or enter a waiting state. , until existing connections are released. When setting the maximum number of connections, make adjustments based on actual needs and server resources, and ensure that the server can handle the load of all connections.

Operating system for this tutorial: Windows 10 system, MySQL 8 version, Dell G3 computer.

The maximum number of MySQL connections refers to the maximum number of client connections that the MySQL database server can accept simultaneously. Whenever a client application (such as a website, application, etc.) connects to the MySQL server, a connection is consumed. If the maximum number of connections is reached, new connection requests will be rejected or entered into a waiting state until an existing connection is released.

The maximum number of MySQL connections is defined by the max_connections parameter in the configuration file. This parameter determines the maximum number of client connections that the database server can accept. By default, the maximum number of MySQL connections is 150.

It should be noted that increasing the maximum number of connections may have an impact on the performance of the server, because each connection requires certain system resources. If the server is under high load or has limited resources, increasing the maximum number of connections may cause the server to respond slowly or even crash. Therefore, you need to carefully evaluate the server's hardware resources and load before adjusting the maximum number of connections.

You can increase or decrease the maximum number of connections by modifying the max_connections parameter in the MySQL configuration file (such as my.cnf). After modification, you need to restart the MySQL service for the modification to take effect. In addition, you can also modify the maximum number of connections dynamically, using the following SQL statement:

SET GLOBAL max_connections = <new_value>;

Among them, is the new maximum connection value set.

It is recommended that when setting the maximum number of connections, make adjustments based on actual needs and server resources, and ensure that the server can handle the load of all connections.

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