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https://dev.mysql.com/doc/refman/9.7/en/innodb-multi-versioning.html
The roll pointer points to an undo log record written to the rollback segment. Records in a clustered index are updated in-place, and their hidden system columns point undo log entries from which earlier versions of records can be reconstructed. It ...
https://dev.mysql.com/doc/refman/9.7/en/innodb-performance-midpoint_insertion.html
This arrangement divides the LRU list into two segments, where the pages downstream of the insertion point are considered “old” and are desirable victims for LRU eviction. You can control the insertion point in the LRU list and choose whether ...
https://dev.mysql.com/doc/refman/9.7/en/keyring-encrypted-file-component.html
This path must not point to or include the MySQL data directory. The local file looks like this: { "path": "/usr/local/mysql/keyring/component_keyring_encrypted_file.keys", "password": "password", "read_only": false } This path must not point to or ... Note component_keyring_encrypted_file is an extension included in MySQL Enterprise Edition, a commercial ...
https://dev.mysql.com/doc/refman/9.7/en/keyring-file-component.html
This path must not point to or include the MySQL data directory. The local file looks like this: { "path": "/usr/local/mysql/keyring/component_keyring_file.keys", "read_only": false } This path must not point to or include the MySQL data directory.
https://dev.mysql.com/doc/refman/9.7/en/keywords.html
At some point, you might upgrade to a higher version, so it is a good idea to have a look at future reserved words, too. Certain keywords, such as SELECT, DELETE, or BIGINT, are reserved and require special treatment for use as identifiers such as ...
https://dev.mysql.com/doc/refman/9.7/en/locking-service.html
For example, if the statement fails part way through and rolls back, locks acquired up to the point of failure still exist. MySQL distributions provide a locking interface that is accessible at two levels: At the SQL level, as a set of loadable ...
https://dev.mysql.com/doc/refman/9.7/en/memory-storage-engine.html
Shared-nothing architecture and multiple-host operation with no single point of failure, enabling 99.999% availability. The memory needed for one row in a MEMORY table is calculated using the following expression: ... The MEMORY storage engine ...
https://dev.mysql.com/doc/refman/9.7/en/myisam-storage-engine.html
Table 18.2 MyISAM Storage Engine Features Feature Support B-tree indexes Yes Backup/point-in-time recovery (Implemented in the server, rather than in the storage engine.) Yes Cluster database support No Clustered indexes No Compressed data Yes ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-backup-using-management-client.html
At this point in the backup process the cluster has received and processed the backup request. Note At this point, the management client has not yet received a response from the cluster data nodes to this request, and the backup has not yet actually ... Before starting a backup, make sure that the cluster is properly configured for performing ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-basics.html
In addition, to provide a single point of configuration, all configuration data for the cluster as a whole is located in one configuration file. NDB Cluster logs events by category (startup, shutdown, errors, checkpoints, and so on), priority, and ... NDBCLUSTER (also known as NDB) is an in-memory storage engine offering high-availability and data-persistence ...