Meaning
This error message appears when a user has exceeded the maximum number of simultaneous connections to the database. MySQL has a set limit for how many connections a user can have at the same time. Once this limit is reached, the server displays the message max_user_connections exceeded.
Causes
Too many simultaneous database connections are active.
The application or website does not properly close database connections after use.
Inefficient code or unoptimized processes result in a high number of open connections.
Possible solutions
Check and properly close connections
Make sure all database connections are closed after use. Any connection that is no longer needed should be terminated as quickly as possible to minimize resource usage.
In PHP, for example, you can close the connection after a query like this:
mysqli_close($connection);
Note: It is important to set the limit for simultaneous connections so that it meets the requirements of your application without affecting server performance. Optimized processes and efficient connection management help reduce the occurrence of this problem.