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https://dev.mysql.com/doc/refman/8.0/en/group-replication-throttling.html
Based on the metrics gathered across all servers in the group, a throttling mechanism kicks in and decides whether to limit the rate a member is able to execute/commit new transactions. The lowest capacity of all the members in the group determines ...Therefore, metrics acquired from all members are the basis for calculating the capacity of each member: if a member has a large queue (for certification or the applier thread), then the capacity to execute new transactions should be close to ones certified or applied in the last ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-connection-control-failed-login-attempts-table.html
The number of attempts for which the server added a delay to its response is the difference between the FAILED_ATTEMPTS value and the connection_control_failed_connections_threshold system variable value. Notes The ... This table provides ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-fields-table.html
For related usage information and examples, see Section 17.15.3, “InnoDB INFORMATION_SCHEMA Schema Object Tables”. POS The ordinal position of the key field within the index, starting from 0 and incrementing sequentially. Use the ... The ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-innodb-virtual-table.html
The INNODB_VIRTUAL table provides metadata about InnoDB virtual generated columns and columns upon which virtual generated columns are based. The value is large because it encodes the column sequence number and ordinal position. Use the ...A row ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-key-column-usage-table.html
This table provides no information about functional key parts because they are expressions and the table provides information only about columns. The KEY_COLUMN_USAGE table has these columns: CONSTRAINT_CATALOG The name of the catalog to which the ...
https://dev.mysql.com/doc/refman/8.0/en/information-schema-mysql-firewall-users-table.html
It lists names and operational modes of registered firewall account profiles. As of MySQL 8.0.26, this table is deprecated and subject to removal in a future MySQL version. The MYSQL_FIREWALL_USERS table provides a view into the in-memory data ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-configuration.html
This section provides configuration information and procedures for InnoDB initialization, startup, and various components and features of the InnoDB storage engine. For information about optimizing database operations for InnoDB tables, see Section ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-information-schema-temp-table-info.html
The number of columns (N_COLS) is 4 rather than 1 because InnoDB always creates three hidden table columns (DB_ROW_ID, DB_TRX_ID, and DB_ROLL_PTR). mysql> SELECT * FROM INFORMATION_SCHEMA.INNODB_TEMP_TABLE_INFO\G An empty set is returned because ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-memcached-developing.html
With the daemon_memcached plugin, instead of many traditional memcached servers running on low-powered machines, you have the same number of memcached servers as MySQL servers, running on relatively high-powered machines with substantial disk ...
https://dev.mysql.com/doc/refman/8.0/en/insert-delayed.html
The DELAYED option for the INSERT statement is a MySQL extension to standard SQL. The server recognizes but ignores the DELAYED keyword, handles the insert as a nondelayed insert, and generates an ER_WARN_LEGACY_SYNTAX_CONVERTED warning: INSERT ...