extra_max_connections

Support CLI: Yes

Support configuration file: Yes

Support dynamic modification: Yes

Scope: global

Parameter type: numeric

Default value: 1

Value range: 1 to 100000

This parameter specifies the maximum number of user connections allowed on the extra port. When the specified value is reached, an extra SUPER user connection can be established on the extra port. This parameter is used with extra_port in case all worker threads are busy or locked when the thread pool feature is enabled and new connections cannot be established.