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https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-programs-ndb-print-backup-file.html
--table-id Command-Line Format --table-id=# Type Integer Default Value [none] Table ID. Usage ndb_print_backup_file [-P password] file_name file_name is the name of a cluster backup file. This can be any of the files (.Data, .ctl, or .log file) ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-replication-failover.html
This means that the ndb_apply_status table contains information for the replica on this host as well as for any other host which acts as a replica of the replication source server running on this host. Using the information obtained from the query ... In the event that the primary Cluster replication process fails, it is possible to switch over to the secondary replication ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-configurator-workflow-server.html
While MySQL Configurator may attempt (and succeed) to perform an in-place upgrade for other scenarios, the following table lists the scenarios officially supported by the configurator: Table 2.5 Supported Upgrade Paths A supported upgrade scenario ... MySQL Configurator performs the initial configuration, a reconfiguration, and also functions as part of the uninstallation ...
https://dev.mysql.com/doc/refman/8.4/en/no-matching-rows.html
If you have a complicated query that uses many tables but that returns no rows, you should use the following procedure to find out what is wrong: Test the query with EXPLAIN to check whether you can find something that is obviously wrong. Remove ...
https://dev.mysql.com/doc/refman/8.4/en/obtaining-plugin-information.html
There are several ways to determine which plugins are installed in the server: The Information Schema PLUGINS table contains a row for each loaded plugin. The mysql.plugin table shows which plugins have been registered with INSTALL PLUGIN. The ...
https://dev.mysql.com/doc/refman/8.4/en/out-of-range-and-overflow.html
In strict mode, these statements fail, and some or all the values are not inserted or changed, depending on whether the table is a transactional table and other factors. If no restrictive modes are enabled, MySQL clips the value to the appropriate ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-examples.html
The following example provides one methodology that you can use to analyze a repeatable problem, such as investigating a performance bottleneck. To begin, you should have a repeatable use case where performance is deemed “too slow” and needs ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-instrument-filtering.html
The setup_instruments table lists the available instruments: mysql> SELECT NAME, ENABLED, TIMED FROM performance_schema.setup_instruments; +---------------------------------------------------+---------+-------+ | NAME | ENABLED | TIMED | ...| ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-startup-configuration.html
Consumer names in the setup_consumers table use underscores, but for consumers set at startup, dashes and underscores within the name are equivalent. The other variables indicate table sizes (number of rows) or memory allocation values. For example, ... To use the MySQL Performance Schema, it must be enabled at server startup to enable event collection to ...
https://dev.mysql.com/doc/refman/8.4/en/primary-key-optimization.html
The primary key for a table represents the column or set of columns that you use in your most vital queries. With the InnoDB storage engine, the table data is physically organized to do ultra-fast lookups and sorts based on the primary key column ...Query performance benefits from the NOT NULL optimization, because it cannot include any NULL ...