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https://dev.mysql.com/doc/refman/9.7/en/sys-ps-thread-stack.html
Returns a JSON formatted stack of all statements, stages, and events within the Performance Schema for a given thread ID. The value should match the THREAD_ID column from some Performance Schema threads table row. row *************************** ...
https://dev.mysql.com/doc/refman/9.7/en/sys-ps-truncate-all-tables.html
Truncates all Performance Schema summary tables, resetting all aggregated instrumentation as a snapshot. Parameters in_verbose BOOLEAN: Whether to display each TRUNCATE TABLE statement before executing it. Example mysql> CALL ...
https://dev.mysql.com/doc/refman/9.7/en/telemetry-logs-configuration.html
For information on the configured loggers, see Section 29.12.21.1, “The setup_loggers Table”. Server Configuration System Variables Server Configuration Status Variables Server Configuration Command Line Server Configuration System Variables The ...
https://dev.mysql.com/doc/refman/9.7/en/telemetry-metrics-configuration.html
This section lists the system variables used to configure Metric telemetry. Server Configuration telemetry.metrics_enabled System Variable telemetry.metrics_enabled Scope Global Dynamic No SET_VAR Hint Applies No Type Boolean Default Value OFF ...
https://dev.mysql.com/doc/refman/9.7/en/working-with-null.html
The NULL value can be surprising until you get used to it. Conceptually, NULL means “a missing unknown value” and it is treated somewhat differently from other values. In MySQL, 0 or NULL means false and anything else means true. This special ...
https://dev.mysql.com/doc/refman/9.7/en/x-plugin-options-system-variables.html
To control activation of X Plugin, use this option: --mysqlx[=value] Command-Line Format --mysqlx[=value] Type Enumeration Default Value ON Valid Values ONOFFFORCEFORCE_PLUS_PERMANENT This option controls how the server loads X Plugin at startup.
https://dev.mysql.com/doc/refman/9.7/en/charset-applications.html
For applications that store data using the default MySQL character set and collation (utf8mb4, utf8mb4_0900_ai_ci), no special configuration should be needed. If applications require data storage using a different character set or collation, you ...
https://dev.mysql.com/doc/refman/9.7/en/charset-cp932.html
Why is cp932 needed? In MySQL, the sjis character set corresponds to the Shift_JIS character set defined by IANA, which supports JIS X0201 and JIS X0208 characters. (See http://www.iana.org/assignments/character-sets.) However, the meaning of ...
https://dev.mysql.com/doc/refman/9.7/en/charset-unicode-sets.html
This section describes the collations available for Unicode character sets and their differentiating properties. MySQL supports multiple Unicode character sets: utf8mb4: A UTF-8 encoding of the Unicode character set using one to four bytes per ...
https://dev.mysql.com/doc/refman/9.7/en/components.html
MySQL Server includes a component-based infrastructure for extending server capabilities. A component provides services that are available to the server and other components. (With respect to service use, the server is a component, equal to other ...