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https://dev.mysql.com/doc/refman/8.4/en/host-cache.html
The Performance Schema host_cache table exposes the contents of the host cache so that it can be examined using SELECT statements. It does not use the cache for TCP connections established using a loopback interface address (for example, 127.0.0.1 ... The MySQL server maintains an in-memory host cache that contains information about clients: IP address, host name, and error ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-consistent-read.html
This exception causes the following anomaly: If you update some rows in a table, a SELECT sees the latest version of the updated rows, but it might also see older versions of any rows. If other sessions simultaneously update the same table, the ...
https://dev.mysql.com/doc/refman/8.4/en/innodb-temporary-tablespace.html
InnoDB uses session temporary tablespaces and a global temporary tablespace. Session Temporary Tablespaces Session temporary tablespaces store user-created temporary tables and internal temporary tables created by the optimizer when InnoDB is ...
https://dev.mysql.com/doc/refman/8.4/en/load-data-local-security.html
The LOAD DATA statement loads a data file into a table. To avoid connecting to untrusted servers, clients can establish a secure connection and verify the server identity by connecting using the --ssl-mode=VERIFY_IDENTITY option and the appropriate ...The statement can load a file located on the server host, or, if the LOCAL keyword is specified, on the client ...
https://dev.mysql.com/doc/refman/8.4/en/myisamchk-check-options.html
myisamchk supports the following options for table checking operations: --check, -c Command-Line Format --check Check the table for errors. --check-only-changed, -C Command-Line Format --check-only-changed Check only tables that have changed since ...This is the default operation if you specify no option that selects an operation type ...
https://dev.mysql.com/doc/refman/8.4/en/mysql-cluster-online-add-node-basics.html
ALGORITHM=INPLACE, REORGANIZE PARTITION statement in the mysql client for each NDBCLUSTER table. Exception: For tables created using the MAX_ROWS option, this statement does not work; instead, use ALTER TABLE ... Note This needs to be done only for ... In this section, we list the basic steps required to add new data nodes to an NDB ...
https://dev.mysql.com/doc/refman/8.4/en/mysqladmin.html
drop db_name Delete the database named db_name and all its tables. Caution Do not use this command used if the server was started with the --skip-grant-tables option. This is true even if you precede the password command with flush-privileges on the ...You can use it to check the server's configuration and current status, to create and drop databases, and ...
https://dev.mysql.com/doc/refman/8.4/en/performance-schema-pre-filtering.html
Pre-filtering can be applied to either the producer or consumer stage of event processing: To configure pre-filtering at the producer stage, several tables can be used: setup_instruments indicates which instruments are available. An instrument ...
https://dev.mysql.com/doc/refman/8.4/en/temporary-files.html
The maximum disk space required is determined by the following expression: (length of what is sorted + sizeof(row pointer)) * number of matched rows * 2 The row pointer size is usually four bytes, but may grow in the future for really big tables.
https://dev.mysql.com/doc/refman/8.4/en/upgrade-binary-package.html
For example: mysqld_safe --user=mysql --datadir=/path/to/existing-datadir & If there are encrypted InnoDB tablespaces, use the --early-plugin-load option to load the keyring plugin. When you start the MySQL 8.4 server, it automatically detects ...