View the current mysql connection and maximum number of connections

Run the show variables like "max_connections" command to view the maximum number of connections of the current mysql database ";

View the details of the current connection and view the commands of the terminals currently connected: show full processlist; show processlist; you can also find the current number of connections. The difference is that it only displays the first 100 connections.

If you think a connection is suspicious, the command to kill a connection process is: kill [id], for example, kill 15;

Tip: We recommend that you check the current number of connections in mysql from time to detect the number of connections is insufficient and modify the maximum number of connections to ensure stable and persistent running of the project.