https://dev.mysql.com/ndb-restore-different-number-nodes.html
When performing a backup using the method described in this section, ndb_restore connects to the management server and obtains a list of data nodes in the cluster the backup is being restored to. To rebuild the indexes, execute the following command ... It is possible to restore from an NDB backup to a cluster having a different number of data nodes than the original from which the backup was ...
https://dev.mysql.com/packet-too-large.html
When a MySQL client or the mysqld server receives a packet bigger than max_allowed_packet bytes, it issues an ER_NET_PACKET_TOO_LARGE error and closes the connection. With some clients, you may also get a Lost connection to MySQL server during query ... A communication packet is a single SQL statement sent to the MySQL server, a single row that is sent to the client, or a binary log event sent from a master replication server to a ...
https://dev.mysql.com/password-security-user.html
When you run a client program to connect to the MySQL server, it is inadvisable to specify your password in a way that exposes it to discovery by other users. The file can be read later by MySQL client programs to obtain authentication credentials ... MySQL users should use the following guidelines to keep passwords ...
https://dev.mysql.com/performance-schema-instance-tables.html
They provide event names and explanatory notes or status information: cond_instances: Condition synchronization object instances file_instances: File instances mutex_instances: Mutex synchronization object instances rwlock_instances: Lock ...There ...
https://dev.mysql.com/performance-schema-replication-group-members-table.html
The network addresses shown are the addresses used to connect clients to the group, and should not be confused with the member's internal group communication address specified by group_replication_local_address. This is the address which clients ...
https://dev.mysql.com/performance-schema-tp-thread-group-stats-table.html
Note The Performance Schema table described here is available as of MySQL 8.0.14. Prior to MySQL 8.0.14, use the corresponding INFORMATION_SCHEMA table instead; see Section 25.48.2, “The INFORMATION_SCHEMA TP_THREAD_GROUP_STATS Table”. The ...
https://dev.mysql.com/performance-schema-variables-info-table.html
If a client connects as user17 from host host34.example.com using the account 'user17'@'%.example.com, SET_USER and SET_HOST will be user17 and host34.example.com, respectively. For proxy user connections, these values correspond to the external ...
https://dev.mysql.com/perl-installation.html
These tests attempt to connect to the local MySQL server using the default user name and password. The default password is “no password.”) If you cannot connect to the server with those values (for example, if your account has a password), the ... MySQL Perl support requires that you have installed MySQL client programming support (libraries and header ...
https://dev.mysql.com/persisted-system-variables.html
Examples: SET PERSIST max_connections = 1000; SET @@PERSIST.max_connections = 1000; SET PERSIST_ONLY back_log = 100; SET @@PERSIST_ONLY.back_log = 100; MySQL also provides a RESET PERSIST statement for removing persisted system variables from ...
https://dev.mysql.com/plugin-types.html
Plugins on the server side implement authentication methods for use by clients when they connect to the server. A server-side authentication plugin can return to the server the name of the user whose identity the connecting user should have. The ...