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https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-replication-issues.html
This can be done by issuing a statement such as ALTER TABLE mysql.ndb_apply_status ENGINE=MyISAM on the replica. In the event of a node failure, errors in replication of NDB tables without primary keys can still occur, due to the possibility of ...
https://dev.mysql.com/doc/refman/5.7/en/corrupted-myisam-tables.html
Even though the MyISAM table format is very reliable (all changes to a table made by an SQL statement are written before the statement returns), you can still get corrupted tables if any of the following events occur: The mysqld process is killed ...An unexpected computer shutdown occurs (for example, the computer is turned ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-programs-ndb-show-tables.html
ndb_show_tables displays a list of all NDB database objects in the cluster. By default, this includes not only both user-created tables and NDB system tables, but NDB-specific indexes, internal triggers, and NDB Cluster Disk Data objects as well.
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-memory-summary-tables.html
Memory summary tables do not contain timing information because memory events are not timed. Example memory event summary information: mysql> SELECT * FROM performance_schema.memory_summary_global_by_event_name WHERE EVENT_NAME = ...Operation counts ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-stage-summary-tables.html
The Performance Schema maintains tables for collecting current and recent stage events, and aggregates that information in summary tables. Section 25.12.5, “Performance Schema Stage Event Tables” describes the events on which stage summaries ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-transaction-summary-tables.html
The Performance Schema maintains tables for collecting current and recent transaction events, and aggregates that information in summary tables. Section 25.12.7, “Performance Schema Transaction Tables” describes the events on which transaction ...Example transaction event summary information: mysql> SELECT * FROM performance_schema.events_transactions_summary_global_by_event_name LIMIT 1\G *************************** ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-limitations-storage-engines.html
(This is currently supported only by MyISAM.) In addition, ALTER TABLE ... CREATE TABLE and ALTER TABLE statements that would cause a user-partitioned NDB table not to meet either or both of the following two requirements are not permitted, and fail ... The following limitations apply to the use of storage engines with user-defined partitioning of ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-innodb-sys-tablestats-table.html
The INNODB_SYS_TABLESTATS table provides a view of low-level status information about InnoDB tables. This data is used by the MySQL optimizer to calculate which index to use when querying an InnoDB table. InnoDB tables are represented in this view ...This information is derived from in-memory data structures rather than data stored on ...
https://dev.mysql.com/doc/refman/5.7/en/index-page-merge-threshold.html
The MERGE_THRESHOLD for index pages can be defined for a table or for individual indexes. A MERGE_THRESHOLD value defined for an individual index takes priority over a MERGE_THRESHOLD value defined for the table. Setting MERGE_THRESHOLD for a Table ...If the “page-full” percentage for an index page falls below the MERGE_THRESHOLD value when a row is deleted or when a row is shortened by an UPDATE operation, InnoDB attempts to merge the index page with a neighboring index ...
https://dev.mysql.com/doc/refman/5.7/en/creating-tables.html
If you make a poor choice and it turns out later that you need a longer field, MySQL provides an ALTER TABLE statement. You want a table that contains a record for each of your pets. This can be called the pet table, and it should contain, as a bare ...For example, if more than one person in your family keeps pets, you might want to list each animal's ...