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https://dev.mysql.com/doc/refman/8.0/en/mysqld.html
mysqld, also known as MySQL Server, is a single multithreaded program that does most of the work in a MySQL installation. MySQL Server manages access to the MySQL data directory that contains databases and tables. The data directory is also the ...
https://dev.mysql.com/doc/refman/8.0/en/optimize-numeric.html
For unique IDs or other values that can be represented as either strings or numbers, prefer numeric columns to string columns. Since large numeric values can be stored in fewer bytes than the corresponding strings, it is faster and takes less ...
https://dev.mysql.com/doc/refman/8.0/en/option-file-options.html
Most MySQL programs that support option files handle the following options. Because these options affect option-file handling, they must be given on the command line and not in an option file. To work properly, each of these options must be given ...
https://dev.mysql.com/doc/refman/8.0/en/option-files.html
Most MySQL programs can read startup options from option files (sometimes called configuration files). Option files provide a convenient way to specify commonly used options so that they need not be entered on the command line each time you run a ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-miscellaneous-tables.html
The following sections describe tables that do not fall into the table categories discussed in the preceding sections: component_scheduler_tasks: The current status of each scheduled task. user_defined_functions: Loadable functions registered by a ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-setup-actors-table.html
The setup_actors table contains information that determines whether to enable monitoring and historical event logging for new foreground server threads (threads associated with client connections). This table has a maximum size of 100 rows by ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-stage-tables.html
The Performance Schema instruments stages, which are steps during the statement-execution process, such as parsing a statement, opening a table, or performing a filesort operation. Stages correspond to the thread states displayed by SHOW ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-status-variable-summary-tables.html
The Performance Schema makes status variable information available in the tables described in Section 29.12.15, “Performance Schema Status Variable Tables”. It also makes aggregated status variable information available in summary tables, ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-tp-thread-state-table.html
Note The Performance Schema table described here is available as of MySQL 8.0.14. Prior to MySQL 8.0.14, use the corresponding INFORMATION_SCHEMA table instead; see Section 28.5.4, “The INFORMATION_SCHEMA TP_THREAD_STATE Table”. The ...
https://dev.mysql.com/doc/refman/8.0/en/pluggable-storage-common-layer.html
A MySQL pluggable storage engine is the component in the MySQL database server that is responsible for performing the actual data I/O operations for a database as well as enabling and enforcing certain feature sets that target a specific ...