https://dev.mysql.com/sql-mode.html
Each client can change its session sql_mode value at any time. It does not apply TIMESTAMP columns, which always require a valid date. Because storage engines can be pluggable at runtime, unavailable engines are treated the same way: With ... The ...
https://dev.mysql.com/statement-summary-tables.html
The QUERY_SAMPLE_TEXT, QUERY_SAMPLE_SEEN, and QUERY_SAMPLE_TIMER_WAIT columns also are neither grouping nor summary columns; they support statement sampling.) The maximum number of rows in the table is autosized at server startup. For example, the ... The Performance Schema maintains tables for collecting current and recent statement events, and aggregates that information in summary ...
https://dev.mysql.com/sys-metrics.html
This view summarizes MySQL server metrics to show variable names, values, types, and whether they are enabled. The metric type determines the source from which the name is taken: For global status variables: The VARIABLE_NAME column of the ...
https://dev.mysql.com/sys-statements-with-sorting.html
total_latency The total wait time of timed occurrences of the statement. last_seen The time at which the statement was most recently seen. The statements_with_sorting and x$statements_with_sorting views have these columns: query The normalized ...
https://dev.mysql.com/sys-statements-with-temp-tables.html
total_latency The total wait time of timed occurrences of the statement. last_seen The time at which the statement was most recently seen. These views list normalized statements that have used temporary tables. By default, rows are sorted by ...
https://dev.mysql.com/timestamp-initialization.html
TIMESTAMP and DATETIME columns can be automatically initializated and updated to the current date and time (that is, the current timestamp). For any TIMESTAMP or DATETIME column in a table, you can assign the current timestamp as the default value, ...An auto-updated column remains unchanged if all other columns are set to their current ...
https://dev.mysql.com/user-resources.html
To establish resource limits for an account at account-creation time, use the CREATE USER statement. For example, to remove the limit on how many times per hour francis can connect, use this statement: mysql> ALTER USER 'francis'@'localhost' WITH ...
https://dev.mysql.com/x-plugin-options-system-variables.html
mysqlx_connect_timeout Property Value Command-Line Format --mysqlx-connect-timeout=# System Variable mysqlx_connect_timeout Scope Global Dynamic Yes SET_VAR Hint Applies No Type Integer Default Value 30 Minimum Value 1 Maximum Value 1000000000 The ... To control activation of X Plugin, use this option: --mysqlx[=value] Property Value Command-Line Format --mysqlx[=value] Introduced 8.0.11 Type Enumeration Default Value ON Valid Values ONOFFFORCEFORCE_PLUS_PERMANENT This option controls how the server loads X Plugin at ...
https://dev.mysql.com/can-not-connect-to-server.html
If you get the error message Can't connect to MySQL server on some_host, you can try the following things to find out what the problem is: Check whether the server is running on that host by executing telnet some_host 3306 and pressing the Enter key ... A MySQL client on Unix can connect to the mysqld server in two different ways: By using a Unix socket file to connect through a file in the file system (default /tmp/mysql.sock), or by using TCP/IP, which connects through a port ...
https://dev.mysql.com/change-master-to.html
The slave_net_timeout system variable specifies the number of seconds that the slave waits for either more data or a heartbeat signal from the master, before the slave considers the connection broken, aborts the read, and tries to reconnect. The ...
