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https://dev.mysql.com/doc/refman/8.0/en/miscellaneous-functions.html
(For details about this format, see the UUID() function description.) If the UUID argument is NULL, the return value is NULL. For usage examples and information about time-part swapping, see the UUID_TO_BIN() function description. mysql> UPDATE t ...
https://dev.mysql.com/doc/refman/8.0/en/mysqld-multi.html
For information about using systemd to handle multiple MySQL instances, see Section 2.5.9, “Managing MySQL Server with systemd”. For more information on which options must be unique per server in a multiple-server environment, see Section 7.8, ... mysqld_multi is designed to manage several mysqld processes that listen for connections on different Unix socket files and TCP/IP ...
https://dev.mysql.com/doc/refman/8.0/en/comp-err.html
It compiles the errmsg.sys file from text-format error information in MySQL source distributions: As of MySQL 8.0.19, the error information comes from the messages_to_error_log.txt and messages_to_clients.txt files in the share directory. For more ... comp_err creates the errmsg.sys file that is used by mysqld to determine the error messages to display for different error ...
https://dev.mysql.com/doc/refman/8.0/en/data-size.html
MySQL supports many different storage engines (table types) and row formats. Choosing the proper table format for your application can give you a big performance gain. You can get better performance for a table and minimize storage space by using ...
https://dev.mysql.com/doc/refman/8.0/en/myisampack.html
When the table is used later, the server reads into memory the information needed to decompress columns. --help, -? Command-Line Format --help Display a help message and exit. --backup, -b Command-Line Format --backup Make a backup of each table's ...This results in much better performance when accessing individual rows, because you only have to uncompress exactly one ...
https://dev.mysql.com/doc/refman/8.0/en/ibd2sdi.html
ibd2sdi is a utility for extracting serialized dictionary information (SDI) from InnoDB tablespace files. ibd2sdi outputs SDI (containing id, type, and data fields) in JSON format. ibd2sdi Options ibd2sdi supports the following options: --help, -h ...ibd2sdi can be run on file-per-table tablespace files (*.ibd files), general tablespace files (*.ibd files), system tablespace files (ibdata* files), and the data dictionary tablespace ...
https://dev.mysql.com/doc/refman/8.0/en/lock-order-tool.html
This section provides information about using the LOCK_ORDER tool, but only at a basic level. lock_order_debug_loop Command-Line Format --lock-order-debug-loop[={OFF|ON}] Introduced 8.0.17 System Variable lock_order_debug_loop Scope Global Dynamic ... The MySQL server is a multithreaded application that uses numerous internal locking and lock-related primitives, such as mutexes, rwlocks (including prlocks and sxlocks), conditions, and ...
https://dev.mysql.com/doc/refman/8.0/en/added-deprecated-removed.html
binlog_transaction_dependency_tracking: Source of dependency information (commit timestamps or transaction write sets) from which to assess which transactions can be executed in parallel by replica's multithreaded applier. log_slow_extra: Whether to ... Options and Variables Introduced in MySQL 8.0 Options and Variables Deprecated in MySQL 8.0 Options and Variables Removed in MySQL 8.0 This section lists server variables, status variables, and options that were added for the first time, have been deprecated, or have been removed in MySQL ...
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/myisamchk-general-options.html
--help, -? Command-Line Format --help Display a help message and exit. --HELP, -H Command-Line Format --HELP Display a help message and exit. --debug=debug_options, -# debug_options Command-Line Format --debug[=debug_options] Type String Default ...