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https://dev.mysql.com/doc/refman/8.0/en/myisamchk-repair-options.html
--recover, -r Command-Line Format --recover Do a repair that can fix almost any problem except unique keys that are not unique (which is an extremely unlikely error with MyISAM tables). --correct-checksum Command-Line Format --correct-checksum ...
https://dev.mysql.com/doc/refman/8.0/en/myisamchk.html
The myisamchk utility gets information about your database tables or checks, repairs, or optimizes them. myisamchk works with MyISAM tables (tables that have .MYD and .MYI files for storing data and indexes). You can also use the CHECK TABLE and ...
https://dev.mysql.com/doc/refman/8.0/en/myisampack.html
When the table is used later, the server reads into memory the information needed to decompress columns. This results in much better performance when accessing individual rows, because you only have to uncompress exactly one row. MySQL uses mmap() ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-added-deprecated-removed.html
Ndb_api_uk_op_count_replica: Number of operations based on or using unique keys by this replica. Ndb_api_uk_op_count_slave: Number of operations based on or using unique keys by this replica. Parameters Introduced in NDB 8.0 The following node ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-api-definition.html
This value must be unique for each node in the cluster, regardless of the type of node. This value must be unique for each node in the cluster, regardless of the type of node. The [mysqld] and [api] sections in the config.ini file define the ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-backup-using-management-client.html
Before starting a backup, make sure that the cluster is properly configured for performing one. If an existing backup_id value is used, the backup fails with the error Backup failed: file already exists. If used, the backup_id must follow ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-limitations-performance.html
Unique hash indexes created with USING HASH cannot be used for accessing a table if NULL is given as part of the key. The following performance issues are specific to or especially pronounced in NDB Cluster: Range scans. There are query performance ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-management.html
(Recall that node_id represents the unique identifier of the node whose activity is being logged.) The cluster log contains event reports generated by ndbd. Managing an NDB Cluster involves a number of tasks, the first of which is to configure and ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-blobs.html
Parts of JSON values exceeding 4000 bytes in size are also stored in this table. For more information about how NDB Cluster stores columns of such types, see String Type Storage Requirements. The part and (NDB 8.0.30 and later) inline sizes of NDB ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-cluster-locks.html
This information can be used to help identify the unique entries in a list of lock requests. The lock ID (lockid column) is unique to this node and block instance. The cluster_locks table provides information about current lock requests holding and ...