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https://dev.mysql.com/doc/refman/5.7/en/create-logfile-group.html
There can be only one log file group per NDB Cluster instance at any given time. The optional UNDO_BUFFER_SIZE parameter sets the size used by the UNDO buffer for the log file group; The default value for UNDO_BUFFER_SIZE is 8M (eight megabytes); ...
https://dev.mysql.com/doc/refman/5.7/en/create-table-foreign-keys.html
A duplicate symbol results in an error similar to: ERROR 1005 (HY000): Can't create table 'test.fk1' (errno: 121). Hidden columns that InnoDB adds to an index are also considered (see Section 14.6.2.1, “Clustered and Secondary Indexes”). Prior ... MySQL supports foreign keys, which permit cross-referencing related data across tables, and foreign key constraints, which help keep the related data ...
https://dev.mysql.com/doc/refman/5.7/en/replication-solutions-backups-read-only.html
Note The instructions in this section place the server to be backed up in a state that is safe for backup methods that get the data from the server, such as mysqldump (see Section 4.5.4, “mysqldump — A Database Backup Program”). You should not ...
https://dev.mysql.com/doc/refman/5.7/en/windows-restrictions.html
Some versions of Windows have a boot time setting to enable larger applications by reducing the kernel application. The following restrictions apply to use of MySQL on the Windows platform: Process memory On Windows 32-bit platforms, it is not ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-backup-concepts.html
A backup is a snapshot of the database at a given time. The data actually stored in the database tables at the time that the backup was made Transaction log. A sequential record telling how and when data was stored in the database Each of these ...
https://dev.mysql.com/doc/refman/5.7/en/replication-howto-additionalslaves.html
Alternatively, if you have already tried to start the new replica after following the remaining steps in this section and have encountered errors like those described previously, then perform the following steps: If you have not already done so, ...
https://dev.mysql.com/doc/refman/5.7/en/sys-host-summary-by-stages.html
total_latency The total wait time of timed occurrences of the stage event for the host. avg_latency The average wait time per timed occurrence of the stage event for the host. By default, rows are sorted by host and descending total latency. The ...
https://dev.mysql.com/doc/refman/5.7/en/sys-user-summary-by-stages.html
total_latency The total wait time of timed occurrences of the stage event for the user. avg_latency The average wait time per timed occurrence of the stage event for the user. By default, rows are sorted by user and descending total stage latency.
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-params-api.html
ConnectBackoffMaxTime: Specifies longest time in milliseconds (~100ms resolution) to allow between connection attempts to any given data node by this API node. Excludes time elapsed while connection attempts are ongoing, which in worst case can take ...ArbitrationDelay: When asked to arbitrate, arbitrator waits this many milliseconds before ... The listing in this section provides information about parameters used in the ...
https://dev.mysql.com/doc/refman/5.7/en/set-transaction.html
If executed between transactions, the statement overrides any preceding statement that sets the next-transaction value of the named characteristics. The statement is not permitted within transactions: mysql> START TRANSACTION; Query OK, 0 rows ...