MySQL view current number of connections, number of connections and maximum connections

MySQL View details of all current connections:

Mysqladmin-u root-p Processlist

MySQL view current number of connections (threads is the number of connections)

Mysqladmin-u root-p Status

uptime:1047464 threads:22 questions:1494780 Slow queries:0 opens:31357 Flush tables:1 Open tables:1981 Queri Es per second avg:1.427

MySQL shows which threads are running

List only the first 100: show Processlist;
All listed: Show full processlist;

To view the number of MySQL connections and the maximum number of connections:

Typically, the maximum number of connections to MySQL is 100 by default, up to 16384.
1. View the maximum number of connections:
Show variables like '%max_connections% ';
2. Modify the maximum number of connections
Method One: Modify the configuration file. Recommended Method One
Go to the MySQL installation directory to open the MySQL profile My.ini or my.cnf find max_connections=100 modify it for the max_connections=1000 service to restart MySQL.
Method Two: Command line modification. Method Two is not recommended
Command line login after MySQL. Set the new MySQL maximum number of connections to 200:
Mysql> set global max_connections=200.
The problem with this approach is that the maximum number of connections set is only valid in the MySQL current service process and will revert to its original state once MySQL restarts. Because the initialization after MySQL starts is to read the data from its configuration file, this method does not make changes to its configuration file.

MySQL view current number of connections, number of connections and maximum connections