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https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-online-add-node-remarks.html
The ability to add new nodes online includes a means to reorganize NDBCLUSTER table data and indexes so that they are distributed across all data nodes, including the new ones, by means of the ALTER TABLE ... However, it is not possible to perform ...Table reorganization of both in-memory and Disk Data tables is ... This section provides general information about the ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-ndbinfo-table-distribution-status.html
The table_distribution_status table provides information about the progress of table distribution for NDB tables. is_reorg_ongoing Whether table is currently being reorganized (1 if true) Notes The table_distribution_status table was added in NDB ...
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/replication-features-temptables.html
The discussion in the following paragraphs does not apply when binlog_format=ROW because, in that case, temporary tables are not replicated; this means that there are never any temporary tables on the replica to be lost in the event of an unplanned ...The remainder of this section applies only when using statement-based or mixed-format ...
https://dev.mysql.com/doc/refman/5.7/en/external-locking.html
External locking is the use of file system locking to manage contention for MyISAM database tables by multiple processes. External locking is used in situations where a single process such as the MySQL server cannot be assumed to be the only ...
https://dev.mysql.com/doc/refman/5.7/en/handler.html
] HANDLER tbl_name CLOSE The HANDLER statement provides direct access to table storage engine interfaces. OPEN statement opens a table, making it accessible using subsequent HANDLER ... This table object is not shared by other sessions and is not ...