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https://dev.mysql.com/doc/refman/9.7/en/performance-schema-runtime-configuration.html
Specific Performance Schema features can be enabled at runtime to control which types of event collection occur. If you have the UPDATE privilege, you can change Performance Schema operation by modifying setup tables to affect how monitoring occurs. For additional details about these tables, see Section 29.12.2, “Performance Schema Setup ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-session-account-connect-attrs-table.html
Application programs can provide key-value connection attributes to be passed to the server at connect time. For descriptions of common attributes, see Section 29.12.9, “Performance Schema Connection Attribute Tables”. The ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-session-connect-attrs-table.html
Application programs can provide key-value connection attributes to be passed to the server at connect time. For descriptions of common attributes, see Section 29.12.9, “Performance Schema Connection Attribute Tables”. To see connection ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-setup-consumers-table.html
For detailed information about the effect of enabling different consumers, see Section 29.4.7, “Pre-Filtering by Consumer”. If you disable a consumer, the server does not spend time adding event information to it. The setup_consumers table has ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-status-monitoring.html
Names for these variables have several forms: Performance_schema_xxx_classes_lost indicates how many instruments of type xxx could not be loaded. Performance_schema_xxx_instances_lost indicates how many instances of object type xxx could not be ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-summary-tables.html
Summary tables provide aggregated information for terminated events over time. The tables in this group summarize event data in different ways. Each summary table has grouping columns that determine how to group the data to be aggregated, and ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-temporary-account-locks-table.html
The temporary_account_locks table lists the users with temporarily locked accounts. The temporary_account_locks table has these columns: USER The user name of the account used. FAILED_LOGIN_ATTEMPTS The number of login attempts, as defined in the ...
https://dev.mysql.com/doc/refman/9.7/en/plugin-loading.html
Server plugins must be loaded into the server before they can be used. It is also possible to control the activation state of loaded plugins at startup, and to unload them at runtime. While a plugin is loaded, information about it is available as ...
https://dev.mysql.com/doc/refman/9.7/en/precision-math.html
MySQL provides support for precision math: numeric value handling that results in extremely accurate results and a high degree control over invalid values. Precision math is based on these two features: SQL modes that control how strict the server ...
https://dev.mysql.com/doc/refman/9.7/en/privilege-changes.html
If the mysqld server is started without the --skip-grant-tables option, it reads all grant table contents into memory during its startup sequence. The in-memory tables become effective for access control at that point. If you modify the grant ...