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https://dev.mysql.com/doc/refman/8.4/en/innodb-information-schema-examples.html
This section describes the use of locking information as exposed by the Performance Schema data_locks and data_lock_waits tables. The tables that contain information about InnoDB transactions and data locks enable you to determine which transaction ...Identifying Blocking Transactions It is sometimes helpful to identify which transaction blocks ...
https://dev.mysql.com/doc/refman/8.4/en/optimizing-queries-myisam.html
Some general tips for speeding up queries on MyISAM tables: To help MySQL better optimize queries, use ANALYZE TABLE or run myisamchk --analyze on a table after it has been loaded with data. (For unique indexes, this is always 1.) MySQL uses this ...This updates a value for each index part that indicates the average number of rows that have the same ...
https://dev.mysql.com/doc/refman/8.4/en/partitioning-maintenance.html
A number of table and partition maintenance tasks can be carried out on partitioned tables using SQL statements intended for such purposes. Table maintenance of partitioned tables can be accomplished using the statements CHECK TABLE, OPTIMIZE ...
https://dev.mysql.com/doc/refman/8.4/en/upgrading-what-is-upgraded.html
Installing a new version of MySQL may require upgrading these parts of the existing installation: The mysql system schema, which contains tables that store information required by the MySQL server as it runs (see Section 7.3, “The mysql System ...
https://dev.mysql.com/doc/ndbapi/en/overview-ndbinterpretedcode-using.html
The space required by each of these methods is shown in the following table: Table 1.1 NdbInterpretedCode methods used to load constant values into NdbInterpretedCode program registers, with required buffer and request message space. Method Buffer ... The next few sections provide information about performing different types of operations with NdbInterpretedCode methods, including resource ...
https://dev.mysql.com/doc/mysql-monitor/8.0/en/mem-qanal-config-ui.html
Notices: Filters on the notices, enabling you to filter the list to show only the queries that did not raise a notice, indicated a full table scan, or indicated that a bad index was used. The database name might be blank, or might not match the ...
https://dev.mysql.com/doc/refman/8.4/en/implicit-commit.html
CREATE TABLE and DROP TABLE statements do not commit a transaction if the TEMPORARY keyword is used. (This does not apply to other operations on temporary tables such as ALTER TABLE and CREATE INDEX, which do cause a commit.) However, although no ...
https://dev.mysql.com/doc/heatwave/en/mys-hwaml-lakehouse.html
You can run the following routines as needed with no changes: ML_TRAIN ML_MODEL_LOAD ML_EXPLAIN ML_PREDICT_TABLE ML_EXPLAIN_TABLE ML_SCORE If you run ML_PREDICT_ROW or ML_EXPLAIN_ROW on data loaded from Object Storage, you cannot use a FROM clause.
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-disk-data-objects.html
NDB Cluster Disk Data storage is implemented using the following objects: Tablespace: Acts as containers for other Disk Data objects. A tablespace contains one or more data files and one or more undo log file groups. Undo log files are used only by ...Undo log file: Contains undo information required for rolling back ...
https://dev.mysql.com/doc/refman/8.4/en/identifier-case-sensitivity.html
Each table within a database corresponds to at least one file within the database directory (and possibly more, depending on the storage engine). Consequently, the case sensitivity of the underlying operating system plays a part in the case ... In ...