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https://dev.mysql.com/doc/refman/8.0/en/performance-schema-accounts-table.html
The accounts table contains a row for each account that has connected to the MySQL server. For each account, the table counts the current and total number of connections. To set the table size explicitly, set the performance_schema_accounts_size ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-hosts-table.html
The hosts table contains a row for each host from which clients have connected to the MySQL server. For each host name, the table counts the current and total number of connections. To set the table size explicitly, set the ...This is NULL for an ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-replication-connection-configuration-table.html
This table shows the configuration parameters used by the replica for connecting to the source. Parameters stored in the table can be changed at runtime with the CHANGE REPLICATION SOURCE TO statement (from MySQL 8.0.23) or CHANGE MASTER TO ...It ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-thread-pool-tables.html
Note The Performance Schema tables described here are available as of MySQL 8.0.14. Prior to MySQL 8.0.14, use the corresponding INFORMATION_SCHEMA tables instead; see Section 28.5, “INFORMATION_SCHEMA Thread Pool Tables”. The following ...They ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-user-defined-functions-table.html
The user_defined_functions table contains a row for each loadable function registered automatically by a component or plugin, or manually by a CREATE FUNCTION statement. For information about operations that add or remove table rows, see Section ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-users-table.html
The users table contains a row for each user who has connected to the MySQL server. For each user name, the table counts the current and total number of connections. To set the table size explicitly, set the performance_schema_users_size system ...
https://dev.mysql.com/doc/refman/8.0/en/federated-description.html
When you create a table using one of the standard storage engines (such as MyISAM, CSV or InnoDB), the table consists of the table definition and the associated data. When you create a FEDERATED table, the table definition is the same, but the ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-deadlock-example.html
Client A enables innodb_print_all_deadlocks, creates two tables, 'Animals' and 'Birds', and inserts data into each. The following example illustrates how an error can occur when a lock request causes a deadlock. Thererfore, the previous read-only ...
https://dev.mysql.com/doc/refman/8.0/en/replication-rbr-usage.html
As noted in Section 19.5.1.31, “Replication and Temporary Tables”, temporary tables are not replicated when using row-based format or (from MySQL 8.0.4) mixed format. Temporary tables are not replicated when using row-based or mixed format ...
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. EXECUTE_AT ...EVENT_SCHEMA The name of the schema (database) to which the event ...