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https://dev.mysql.com/doc/refman/8.0/en/backup-and-recovery.html
It is important to back up your databases so that you can recover your data and be up and running again in case problems occur, such as system crashes, hardware failures, or users deleting data by mistake. Backups are also essential as a safeguard ...
https://dev.mysql.com/doc/refman/8.0/en/data-masking-plugin-functions.html
Prior to MySQL 8.0.19, the functions treat string arguments as binary strings (which means they do not distinguish lettercase), and string return values are binary strings. If a MySQL Enterprise Data Masking and De-Identification function is invoked ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-frequently-asked-questions.html
What is the maximum number of MySQL servers in a group? A group can consist of maximum 9 servers. Attempting to add another server to a group with 9 members causes the request to join to be refused. This limit has been identified from testing and ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-functions.html
The functions described in the following sections are used with Group Replication.
https://dev.mysql.com/doc/refman/8.0/en/group-replication-online-upgrade-combining-versions.html
Group Replication is versioned according to the MySQL Server version that the Group Replication plugin was bundled with. For example, if a member is running MySQL 5.7.26 then that is the version of the Group Replication plugin. For optimal ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-replication-failover.html
In the event that the primary Cluster replication process fails, it is possible to switch over to the secondary replication channel. This means that the ndb_apply_status table contains information for the replica on this host as well as for any ...
https://dev.mysql.com/doc/refman/8.0/en/replication-functions-async-failover.html
The following functions, which are available from MySQL 8.0.22 for standard source to replica replication and from MySQL 8.0.23 for Group Replication, enable you to add and remove replication source servers from the source list for a replication ...
https://dev.mysql.com/doc/refman/8.0/en/replication-functions.html
The functions described in the following sections are used with MySQL Replication. GTID_SUBTRACT() Return all GTIDs in set that are not in subset. MASTER_POS_WAIT() Block until the replica has read and applied all updates up to the specified ...
https://dev.mysql.com/doc/refman/8.0/en/information-functions.html
The conditions for use of SQL_CALC_FOUND_ROWS with UNION are: The SQL_CALC_FOUND_ROWS keyword must appear in the first SELECT of the UNION. ON DUPLICATE KEY UPDATE statements, the affected-rows value per row is 1 if the row is inserted as a new row, ...It may be used to time how quickly MySQL processes the ...
https://dev.mysql.com/doc/refman/8.0/en/optimizing-innodb-bulk-data-loading.html
If you have UNIQUE constraints on secondary keys, you can speed up table imports by temporarily turning off the uniqueness checks during the import session: SET unique_checks=0; ... If you have FOREIGN KEY constraints in your tables, you can speed ... These performance tips supplement the general guidelines for fast inserts in Section 10.2.5.1, “Optimizing INSERT ...