https://dev.mysql.com/mysqld.html
When MySQL server starts, it listens for network connections from client programs and manages access to databases on behalf of those clients. mysqld, also known as MySQL Server, is a single multithreaded program that does most of the work in a ...
https://dev.mysql.com/null-mysql-store-result.html
The data could not be read (an error occurred on the connection). It is possible for mysql_store_result() to return NULL following a successful call to mysql_query(). When this happens, it means one of the following conditions occurred: There was a ...
https://dev.mysql.com/optimize-numeric.html
If you are using numeric data, it is faster in many cases to access information from a database (using a live connection) than to access a text file. For unique IDs or other values that can be represented as either strings or numbers, prefer ...
https://dev.mysql.com/option-file-options.html
A “login path” is an option group containing options that specify which MySQL server to connect to and which account to authenticate as. Most MySQL programs that support option files handle the following options. Because these options affect ...
https://dev.mysql.com/option-files.html
For example, [client] is the appropriate group to use to specify the password for connecting to the server. Most MySQL programs can read startup options from option files (sometimes called configuration files). Option files provide a convenient way ...
https://dev.mysql.com/password-logging.html
An alternative to storing the password in the master info repository is to use the START SLAVE statement to specify credentials for connecting to the master. Passwords can be written as plain text in SQL statements such as CREATE USER, GRANT and ...
https://dev.mysql.com/performance-schema-miscellaneous-tables.html
The following sections describe tables that do not fall into the table categories discussed in the preceding sections: host_cache: Information from the internal host cache. user_defined_functions: User-defined functions registered by a server ...
https://dev.mysql.com/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/performance-schema-setup-instruments-table.html
For example, the wait/synch/mutex/sql/THD::LOCK_query_plan mutex is created each time a session connects, and destroyed when the session disconnects. The setup_instruments table lists classes of instrumented objects for which events can be ...
https://dev.mysql.com/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 ...
