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https://dev.mysql.com/doc/refman/8.0/en/information-schema-schemata-table.html
A schema is a database, so the SCHEMATA table provides information about databases. The SCHEMATA table has these columns: CATALOG_NAME The name of the catalog to which the schema belongs. Caution Because any static global privilege is considered a ...The following statements are equivalent: SELECT SCHEMA_NAME AS `Database` FROM INFORMATION_SCHEMA.SCHEMATA [WHERE SCHEMA_NAME LIKE 'wild'] SHOW DATABASES [LIKE 'wild'] You see only those databases for which you have some kind of privilege, unless you have the global SHOW DATABASES ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-information-schema-tables.html
Two INFORMATION_SCHEMA tables provide information that is of particular use when managing an NDB Cluster. The FILES table provides information about NDB Cluster Disk Data files (see Section 25.6.11.1, “NDB Cluster Disk Data Objects”). The ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-ndbinfo-table-fragments.html
The table_fragments table provides information about the fragmentation, partitioning, distribution, and (internal) replication of NDB tables.
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-cond-instances-table.html
The cond_instances table lists all the conditions seen by the Performance Schema while the server executes. The cond_instances table has these columns: NAME The instrument name associated with the condition. The cond_instances table has these ...A ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-performance-timers-table.html
For an explanation of how event timing occurs, see Section 29.4.1, “Performance Schema Event Timing”. For a cycle timer, the frequency is generally related to the CPU speed. For example, on a system with a 2.4GHz processor, the CYCLE may be ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-replication-asynchronous-connection-failover-managed-table.html
This table holds configuration information used by the replica's asynchronous connection failover mechanism to handle managed groups, including Group Replication topologies. The replication_asynchronous_connection_failover_managed table has these ...When you add a group member to the source list and define it as part of a managed group, the asynchronous connection failover mechanism updates the source list to keep it in line with membership changes, adding and removing group members automatically as they join or ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-replication-asynchronous-connection-failover-table.html
This table holds the replica's source lists for each replication channel for the asynchronous connection failover mechanism. The asynchronous connection failover mechanism automatically establishes an asynchronous (source to replica) replication ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-replication-connection-status-table.html
This table shows the current status of the I/O thread that handles the replica's connection to the source, information on the last transaction queued in the relay log, and information on the transaction currently being queued in the relay log. The ...It contains values that change during the connection, whereas replication_connection_configuration contains values which define how the replica connects to the source and that remain constant during the ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-replication-group-member-stats-table.html
The replication_group_member_stats table has these columns: CHANNEL_NAME Name of the Group Replication channel VIEW_ID Current view identifier for this group. This has a different value for each member in the group. This also serves as a key because ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-replication-group-members-table.html
This table shows network and status information for replication group members. The replication_group_members table has these columns: CHANNEL_NAME Name of the Group Replication channel. The network addresses shown are the addresses used to connect ...