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https://dev.mysql.com/doc/refman/8.4/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 the table is currently being reorganized (1 if true) .
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-rolling-restart.html
Create a backup using the ndb_mgm client START BACKUP command prior to performing the restart. Use mysqldump to create a backup prior to the upgrade; afterward, restore the dump using LOAD DATA. This section discusses how to perform a rolling ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-shell-tutorial-javascript-documents-find.html
You can use placeholders and the bind() method to create saved searches which you can then call with different values. You can use the find() method to query for and return documents from a collection in a schema. MySQL Shell provides additional ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-shell-tutorial-python-documents-find.html
You can use placeholders and the bind() method to create saved searches which you can then call with different values. You can use the find() method to query for and return documents from a collection in a schema. MySQL Shell provides additional ...
https://dev.mysql.com/doc/refman/8.4/en/mysqlbinlog-hexdump.html
Master ID: The server ID of the replication source server that created the event. For more information about binary log format, see MySQL Internals: The Binary Log. In the example shown, '9d fc 5c 43' is the representation of '051024 17:24:13' in ...
https://dev.mysql.com/doc/refman/8.4/en/obtaining-loadable-function-information.html
The Performance Schema user_defined_functions table contains information about the currently installed loadable functions: SELECT * FROM performance_schema.user_defined_functions; The mysql.func system table also lists installed loadable functions, ...This difference makes user_defined_functions preferable to mysql.func for checking which loadable functions are ...
https://dev.mysql.com/doc/refman/8.4/en/optimization-indexes.html
The best way to improve the performance of SELECT operations is to create indexes on one or more of the columns that are tested in the query. Although it can be tempting to create an indexes for every possible column used in a query, unnecessary ...
https://dev.mysql.com/doc/refman/8.4/en/optimizer-trace-implementation.html
A trace is started by creating an instance of Opt_trace_start; information is added to this trace by creating instances of Opt_trace_object and Opt_trace_array, and by using the add() methods of these classes.
https://dev.mysql.com/doc/refman/8.4/en/optimizing-myisam-bulk-data-loading.html
This creates the index tree in memory before writing it to disk, which is much faster than updating the index during LOAD DATA because it avoids lots of disk seeks. The main difference between automatic optimization and using the procedure ... These ...
https://dev.mysql.com/doc/refman/8.4/en/optimizing-spatial-analysis.html
It is also possible to create normal indexes on spatial columns. Other storage engines support non-SPATIAL indexes, as described in Section 15.1.15, “CREATE INDEX Statement”. For MyISAM and InnoDB tables, search operations in columns containing ...