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https://dev.mysql.com/doc/refman/8.4/en/innodb-troubleshooting-datadict.html
The procedure assumes that you only have .ibd file backups, you are recovering to the same version of MySQL that initially created the orphan .ibd files, and that .ibd file backups are clean. See Section 17.6.1.4, “Moving or Copying InnoDB ...
https://dev.mysql.com/doc/refman/8.4/en/invisible-indexes.html
MySQL supports invisible indexes; that is, indexes that are not used by the optimizer. The feature applies to indexes other than primary keys (either explicit or implicit). ALTER INDEX operation: ALTER TABLE t1 ALTER INDEX i_idx INVISIBLE; ALTER ...
https://dev.mysql.com/doc/refman/8.4/en/log-file-maintenance.html
As described in Section 7.4, “MySQL Server Logs”, MySQL Server can create several different log files to help you see what activity is taking place. As mentioned previously, flushing the binary log creates a new binary log file, whereas ...
https://dev.mysql.com/doc/refman/8.4/en/myisam-start.html
myisam_max_sort_file_size The maximum size of the temporary file that MySQL is permitted to use while re-creating a MyISAM index (during REPAIR TABLE, ALTER TABLE, or LOAD DATA). If the file size would be larger than this value, the index is created ... The following options to mysqld can be used to change the behavior of MyISAM ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-limitations-exclusive-to-cluster.html
The following are limitations specific to the NDB storage engine: Machine architecture. All machines used in the cluster must have the same architecture. That is, all machines hosting nodes must be either big-endian or little-endian, and you cannot ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-online-add-node-basics.html
Execute one or more CREATE NODEGROUP commands in the NDB Cluster management client to create the new node group or node groups to which the new data nodes belong. Exception: For tables created using the MAX_ROWS option, this statement does not work; ... In this section, we list the basic steps required to add new data nodes to an NDB ...
https://dev.mysql.com/doc/refman/8.4/en/optimizing-innodb-bulk-data-loading.html
COMMIT; The mysqldump option --opt creates dump files that are fast to import into an InnoDB table, even without wrapping them with the SET autocommit and COMMIT statements. For optimal performance when loading data into an InnoDB FULLTEXT index, ...
https://dev.mysql.com/doc/refman/8.4/en/optimizing-innodb-ddl-operations.html
Many DDL operations on tables and indexes (CREATE, ALTER, and DROP statements) can be performed online. Online DDL support for adding secondary indexes means that you can generally speed up the process of creating and loading a table and associated ...Use TRUNCATE TABLE to empty a table, not DELETE FROM ...
https://dev.mysql.com/doc/refman/8.4/en/partitioning-columns-list.html
See Section 15.1.20, “CREATE TABLE Statement”, for additional information about PARTITION BY LIST COLUMNS() syntax. This is a variant of LIST partitioning that enables the use of multiple columns as partition keys, and for columns of data types ...
https://dev.mysql.com/doc/refman/8.4/en/set-operations.html
Result Set Column Names and Data Types Set Operations with TABLE and VALUES Statements Set Operations using DISTINCT and ALL Set Operations with ORDER BY and LIMIT Limitations of Set Operations SQL set operations combine the results of multiple ...