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https://dev.mysql.com/doc/refman/8.0/en/monitor-innodb-mutex-waits-performance-schema.html
Wait event data collected in Performance Schema tables can help identify mutexes with the most waits or the greatest total wait time, for example. To view available InnoDB mutex wait instruments, query the Performance Schema setup_instruments table.
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-backup-concepts.html
The data actually stored in the database tables at the time that the backup was made Transaction log. Each node saves the same table definitions (for all tables in the cluster) to its own version of this file. BACKUP-backup_id-0.node_id.data A data ... A backup is a snapshot of the database at a given ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-limitations-multiple-nodes.html
Stored procedures, stored functions, triggers, and scheduled events are all supported by tables using the NDB storage engine, but these do not propagate automatically between MySQL Servers acting as Cluster SQL nodes, and must be re-created ...A ...
https://dev.mysql.com/doc/refman/8.0/en/replication-features-errors.html
For example, you might need to create a nonexistent table before you can start the replica again. For nontransactional storage engines such as MyISAM, it is possible to have a statement that only partially updates a table and returns an error code.
https://dev.mysql.com/doc/refman/8.0/en/replication-features-partitioning.html
To avoid stopping replication or creating inconsistencies between the source and replica, always ensure that a table on the source and the corresponding replicated table on the replica are partitioned in the same way. Replication is supported ...
https://dev.mysql.com/doc/refman/8.0/en/set-transaction.html
In read-only mode, it remains possible to change tables created with the TEMPORARY keyword using DML statements. transaction_characteristic: { ISOLATION LEVEL level | access_mode } level: { REPEATABLE READ | READ COMMITTED | READ UNCOMMITTED | ...It ...
https://dev.mysql.com/doc/refman/8.0/en/show-grants.html
Note To display nonprivilege information for MySQL accounts, use the SHOW CREATE USER statement. SHOW GRANTS [FOR user_or_role [USING role [, role] ...]] user_or_role: { user (see Section 8.2.4, “Specifying Account Names”) | role (see Section ...
https://dev.mysql.com/doc/refman/8.0/en/assigning-passwords.html
MySQL stores credentials in the user table in the mysql system database. Operations that assign or modify passwords are permitted only to users with the CREATE USER privilege, or, alternatively, privileges for the mysql database (INSERT privilege to ... Required credentials for clients that connect to the MySQL server can include a ...
https://dev.mysql.com/doc/refman/8.0/en/encryption-functions.html
One way to make collisions detectable is to make the hash column a primary key. As of MySQL 8.0.30, these functions support the use of a key derivation function (KDF) to create a cryptographically strong secret key from the information passed in ...
https://dev.mysql.com/doc/refman/8.0/en/group-replication-configuring-instances.html
For more information, see Section 6.4.5, “mysql_upgrade — Check and Upgrade MySQL Tables”. log_bin=binlog log_slave_updates=ON binlog_format=ROW master_info_repository=TABLE relay_log_info_repository=TABLE ... This section explains the ...