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https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-replication-mta.html
Transaction Dependency and Writeset Handling Transaction dependencies are detected using analysis of each transaction's writeset, that is, the set of rows (table, key values) written by the transaction. Where a table has secondary unique keys, these ...To use this functionality with NDB Cluster, it is necessary that the replica be configured to use multiple worker ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-replication-pitr.html
Performing point-in-time recovery of NDB Cluster tables with NDB Cluster and NDB Cluster Replication can be accomplished using a native NDB data backup (taken by issuing CREATE BACKUP in the ndb_mgm client) and restoring the ndb_binlog_index table ... Point-in-time recovery—that is, recovery of data changes made since a given point in time—is performed after restoring a full backup that returns the server to its state when the backup was ...
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 ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-filtering.html
The setup_instruments table lists the instruments for which events can be collected, whether they are enabled, and (for enabled instruments) whether to collect timing information: mysql> SELECT NAME, ENABLED, TIMED FROM ... Events are processed in a ...
https://dev.mysql.com/doc/refman/8.4/en/reloading-delimited-text-dumps.html
For backups produced with mysqldump --tab, each table is represented in the output directory by an .sql file containing the CREATE TABLE statement for the table, and a .txt file containing the table data. To reload a table, first change location ...
https://dev.mysql.com/doc/refman/8.4/en/replication-privilege-checks-account.html
Executing internal-use BINLOG statements to apply mysqlbinlog output, provided that the account also has permission for the tables and operations in those statements. Updating the system tables mysql.gtid_executed, mysql.slave_relay_log_info, ...
https://dev.mysql.com/doc/refman/8.4/en/revoke.html
To revoke all privileges from a user, use one of the following statements; either of these statements drops all global, database, table, column, and routine privileges for the named users or roles: REVOKE ALL PRIVILEGES, GRANT OPTION FROM ...[IGNORE ...
https://dev.mysql.com/doc/refman/8.4/en/select-optimization.html
Besides SELECT statements, the tuning techniques for queries also apply to constructs such as CREATE TABLE...AS SELECT, INSERT INTO...SELECT, and WHERE clauses in DELETE statements. Indexes are especially important for queries that reference ...
https://dev.mysql.com/doc/refman/8.4/en/server-option-variable-reference.html
The following table lists all command-line options, system variables, and status variables applicable within mysqld. The table lists command-line options (Cmd-line), options valid in configuration files (Option file), server system variables ...If ...
https://dev.mysql.com/doc/refman/8.4/en/server-shutdown.html
For additional information about thread termination, see Section 15.7.8.4, “KILL Statement”, in particular for the instructions about killed REPAIR TABLE or OPTIMIZE TABLE operations on MyISAM tables. If a thread is updating a nontransactional ... The server shutdown process takes place as follows: The shutdown process is ...