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https://dev.mysql.com/doc/refman/8.0/en/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/doc/refman/8.0/en/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 replication source server to a ...
https://dev.mysql.com/doc/refman/8.0/en/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/doc/refman/8.0/en/performance-schema-error-log-table.html
row *************************** LOGGED: 2020-08-06 09:25:03.112801 THREAD_ID: 0 PRIO: System ERROR_CODE: MY-013292 SUBSYSTEM: Server DATA: Admin interface ready for connections, address: '127.0.0.1' port: 33062 The error_log table has the following ... Of the logs the MySQL server maintains, one is the error log to which it writes diagnostic messages (see Section 7.4.2, “The Error ...
https://dev.mysql.com/doc/refman/8.0/en/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/doc/refman/8.0/en/performance-schema-memory-summary-tables.html
In addition, each memory summary table that is aggregated by account, host, user, or thread is implicitly truncated by truncation of the connection table on which it depends, or truncation of memory_summary_global_by_event_name. Operation counts ...
https://dev.mysql.com/doc/refman/8.0/en/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/doc/refman/8.0/en/performance-schema-socket-summary-tables.html
When a connection terminates, the row in socket_summary_by_instance corresponding to it is deleted. COUNT_MISC, SUM_TIMER_MISC, MIN_TIMER_MISC, AVG_TIMER_MISC, MAX_TIMER_MISC These columns aggregate all other socket operations, such as CONNECT, ...
https://dev.mysql.com/doc/refman/8.0/en/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 28.5.3, “The INFORMATION_SCHEMA TP_THREAD_GROUP_STATS Table”. The ...
https://dev.mysql.com/doc/refman/8.0/en/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 are user17 and host34.example.com, respectively. For proxy user connections, these values correspond to the external (proxy) ... The variables_info table shows, for each system variable, the source from which it was most recently set, and its range of ...