https://dev.mysql.com/performance-schema-event-tables.html
For wait, stage, statement, and transaction events, the Performance Schema can monitor and store current events. In addition, when events end, the Performance Schema can store them in history tables. For each event type, the Performance Schema uses ...
https://dev.mysql.com/performance-schema-instrumentation-checking.html
It is always possible to determine what instruments the Performance Schema includes by checking the setup_instruments table. Changes to this code occur often, which also affects the set of instruments. It is not practical to list all the ...
https://dev.mysql.com/performance-schema-replication-tables.html
The following Performance Schema replication tables continue to be populated when the Performance Schema is disabled: replication_connection_configuration replication_connection_status replication_applier_configuration replication_applier_status ...
https://dev.mysql.com/pluggable-authentication-system-variables.html
If authentication_ldap_sasl_max_pool_size=0 to disable pooling, each LDAP connection opened by the plugin uses the values the system variables have at that time. If authentication_ldap_simple_max_pool_size=0 to disable pooling, each LDAP connection ...Communication between the authentication plugin and the LDAP server occurs according to this authentication method to ensure password ...
https://dev.mysql.com/pluggable-authentication.html
To minimize the potential for incompatibilities, regularly upgrade the server, clients, and connectors on a timely basis. The only time the client loads the plugin specified by the server is for a change-plugin request, but in that case it can be ...
https://dev.mysql.com/plugin-services.html
The interface includes a versioning mechanism so that service versions supported by the server can be checked at load time against plugin versions. When you build your plugin, use the -lmysqlservices flag at link time to link in the libmysqlservices ... MySQL server plugins have access to server “plugin services.” The plugin services interface exposes server functionality that plugins can ...
https://dev.mysql.com/precision-math-examples.html
Consider the following stored procedure, which adds .0001 to a variable 1,000 times. This section provides some examples that show precision math query results in MySQL. These examples demonstrate the principles described in Section 12.25.3, ...
https://dev.mysql.com/program-variables.html
Many MySQL programs have internal variables that can be set at runtime using the SET statement. Suffixes for specifying a value multiplier can be used when setting a variable at program invocation time, but not to set the value with SET at runtime.
https://dev.mysql.com/regexp.html
To control the maximum number of steps performed by the engine (and thus indirectly the execution time), set the regexp_time_limit system variable. Because this limit is expressed as number of steps, it affects execution time only indirectly. ICU ...
https://dev.mysql.com/repair-table.html
EXTENDED If you use the EXTENDED option, MySQL creates the index row by row instead of creating one index at a time with sorting. REPAIR TABLE upgrades a table if it contains old temporal columns in pre-5.6.4 format (TIME, DATETIME, and TIMESTAMP ...
