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https://dev.mysql.com/doc/refman/9.7/en/too-many-connections.html
If clients encounter Too many connections errors when attempting to connect to the mysqld server, all available connections are in use by other clients. The permitted number of connections is controlled by the max_connections system variable. The ...
https://dev.mysql.com/doc/refman/9.7/en/connecting-disconnecting.html
To connect to the server, you usually need to provide a MySQL user name when you invoke mysql and, most likely, a password. If the server runs on a machine other than the one where you log in, you must also specify a host name. Contact your ...
https://dev.mysql.com/doc/refman/9.7/en/connection-control-component.html
The Connection Control component for MySQL (component_connection_control) makes it possible to introduce an increasing delay in the MySQL server's response to connection attempts after an arbitrary number of consecutive failed attempts. This ...
https://dev.mysql.com/doc/refman/9.7/en/ipv6-local-connections.html
The following procedure shows how to configure MySQL to permit IPv6 connections by clients that connect to the local server using the ::1 local host address. Start the MySQL server with an appropriate bind_address setting to permit it to accept ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-tcp-definition-direct.html
Setting up a cluster using direct connections between data nodes requires specifying explicitly the crossover IP addresses of the data nodes so connected in the [tcp] section of the cluster config.ini file. In the following example, we envision a ...
https://dev.mysql.com/doc/refman/9.7/en/connection-control-plugin.html
Note The Connection Control plugins are deprecated, and are subject to removal in a future version of MySQL. For more information, see Section 8.4.2.3, “Migrating to the Connection Control Component”. MySQL Server includes a plugin library that ...
https://dev.mysql.com/doc/refman/9.7/en/ipv6-remote-connections.html
The following procedure shows how to configure MySQL to permit IPv6 connections by remote clients. It is similar to the preceding procedure for local clients, but the server and client hosts are distinct and each has its own nonlocal IPv6 address.
https://dev.mysql.com/doc/refman/9.7/en/connection-control-component-migration.html
Migrating from the Connection Control plugins to the Connection Control component consists of the following steps: Remove any references to the plugins in configuration files, including references made by --plugin-load-add or --early-plugin-load or ...
https://dev.mysql.com/doc/refman/9.7/en/connection-management.html
This includes a description of the available connection interfaces, how the server uses connection handler threads, details about the administrative connection interface, and management of DNS lookups.
https://dev.mysql.com/doc/refman/9.7/en/error-lost-connection.html
Usually it indicates network connectivity trouble and you should check the condition of your network if this error occurs frequently. If the error message includes “during query,” this is probably the case you are experiencing. Sometimes the ...