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https://dev.mysql.com/doc/refman/8.0/en/performance-schema-events-stages-current-table.html
The table stores one row per thread showing the current status of the thread's most recent monitored stage event, so there is no system variable for configuring the table size. Of the tables that contain stage event rows, events_stages_current is ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-statement-tables.html
These tables store statement events: events_statements_current: The current statement event for each thread. prepared_statements_instances: Prepared statement instances and statistics The following sections describe the statement event tables. There ...Statement events occur at a high level of the event ...
https://dev.mysql.com/doc/refman/8.0/en/partitioning-overview.html
For more information about permitted partitioning column types and partitioning functions, see Section 26.2, “Partitioning Types”, as well as Section 15.1.20, “CREATE TABLE Statement”, which provides partitioning syntax descriptions and ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-events-table.html
The EVENTS table provides information about Event Manager events, which are discussed in Section 27.4, “Using the Event Scheduler”. The EVENTS table has these columns: EVENT_CATALOG The name of the catalog to which the event belongs. DEFINER ...
https://dev.mysql.com/doc/refman/8.0/en/data-dictionary-usage-differences.html
Use of a data dictionary-enabled MySQL server entails some operational differences compared to a server that does not have a data dictionary: Previously, enabling the innodb_read_only system variable prevented creating and dropping tables only for ...The same principle applies to other table operations that require modifying data dictionary ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-dict-obj-tree.html
This means that you must know the name of any tablespace or log file group associated with a given table, or obtain this information from SHOW CREATE TABLE and then querying INFORMATION_SCHEMA.FILES, or similar means as shown here: mysql> SHOW ...
https://dev.mysql.com/doc/refman/8.0/en/firewall-reference.html
For information about MySQL Enterprise Firewall Information Schema and Performance Schema tables, see Section 28.7, “INFORMATION_SCHEMA MySQL Enterprise Firewall Tables”, and Section 29.12.17, “Performance Schema Firewall Tables”, ...When ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-tablespaces-table.html
SERVER_VERSION The MySQL version that created the tablespace, or the MySQL version into which the tablespace was imported, or the version of the last major MySQL version upgrade. The value can be considered a “creation” marker or “certified” ... The INNODB_TABLESPACES table provides metadata about InnoDB file-per-table, general, and undo ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-ndb-sync-excluded-objects-table.html
This table provides information about NDB database objects which cannot be automatically synchronized between NDB Cluster's dictionary and the MySQL data dictionary. row *************************** SCHEMA_NAME: NULL NAME: ts1 TYPE: TABLESPACE ...
https://dev.mysql.com/doc/refman/8.0/en/added-deprecated-removed.html
innodb_tmpdir: Directory location for temporary table files created during online ALTER TABLE operations. print_identified_with_as_hex: For SHOW CREATE USER, print hash values containing unprintable characters in hex. Replica_open_temp_tables: ...