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https://dev.mysql.com/doc/refman/8.0/en/performance-schema-queries.html
If the event tables contain both file and nonfile information, post-filtering is another way to see information only for file events. By contrast, post-filtering is performed by individual users through the use of queries with appropriate WHERE ...
https://dev.mysql.com/doc/refman/8.0/en/performance-schema-socket-instances-table.html
The table contains one row per TCP/IP or Unix socket file connection. The instruments associated with listening sockets for TCP/IP or Unix socket file connections have a socket_type value of server_tcpip_socket or server_unix_socket, respectively.
https://dev.mysql.com/doc/refman/8.0/en/programs-development.html
In shell scripts, you can use the my_print_defaults program to parse option files and see what options would be used by a given program. Several other language interfaces to MySQL are based on the C client library, and some of them provide a way to ...This works well for programs that use the last instance of an option that is specified multiple ...
https://dev.mysql.com/doc/refman/8.0/en/replication-mode-change-online-verify-transactions.html
A safer method in the sense that it does not depend on timing: if you only have a source with one or more replicas, do the following: On the source, execute: SHOW MASTER STATUS; Note down the values in the File and Position column. This is helpful ... This section explains how to monitor a replication topology and verify that all anonymous transactions have been ...
https://dev.mysql.com/doc/refman/8.0/en/server-system-variable-reference.html
The table lists command-line options (Cmd-line), options valid in configuration files (Option file), server system variables (System Var), and status variables (Status var) in one unified list, with an indication of where each option or variable is ... The following table lists all system variables applicable within ...
https://dev.mysql.com/doc/refman/8.0/en/source-configuration-third-party.html
Third-party tools that need to determine the MySQL version from the MySQL source can read the MYSQL_VERSION file in the top-level source directory. For example, if the version is MySQL 8.0.36, the file looks like this: MYSQL_VERSION_MAJOR=8 ...To ...
https://dev.mysql.com/doc/refman/8.0/en/adding-collation-unicode-uca.html
This section describes how to add a UCA collation for a Unicode character set by writing the <collation> element within a <charset> character set description in the MySQL Index.xml file. It uses a subset of the Locale Data Markup Language (LDML) ...
https://dev.mysql.com/doc/refman/8.0/en/audit-log-elements.html
A set of functions enables manipulation of filtering definitions that control logging behavior, the encryption password, and log file reading. Tables in the mysql system database provide persistent storage of filter and user account data, unless you ... MySQL Enterprise Audit is based on the audit log plugin and related elements: A server-side plugin named audit_log examines auditable events and determines whether to write them to the audit ...
https://dev.mysql.com/doc/refman/8.0/en/charset-unicode-sets.html
A combined character is considered different from the same character written with a single unicode character in string comparisons, and the two characters are considered to have a different length (for example, as returned by the CHAR_LENGTH() ...
https://dev.mysql.com/doc/refman/8.0/en/myisam-table-problems.html
The file format that MySQL uses to store data has been extensively tested, but there are always circumstances that may cause database tables to become corrupted. The following discussion describes how this can happen and how to handle it.