Increase MySQL connections max_connections Rumi, January 19, 2017 If you need to increase MySQL Connections without MySQL restart do like below mysql> show variables like 'max_connections'; +-----------------+-------+ | Variable_name | Value | +-----------------+-------+ | max_connections | 100 | +-----------------+-------+ 1 row in set (0.00 sec) mysql> SET GLOBAL max_connections = 150; Query OK, 0 rows affected (0.00 sec) mysql> show variables like 'max_connections'; +-----------------+-------+ | Variable_name | Value | +-----------------+-------+ | max_connections | 150 | +-----------------+-------+ 1 row in set (0.00 sec) These settings will change at MySQL Restart. For permanent changes add below line in my.cnf and restart MySQL max_connections = 150 Administrations Configurations (Linux) MySQL