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https://dev.mysql.com/mysql-commands.html
mysql sends each SQL statement that you issue to the server to be executed. There is also a set of commands that mysql itself interprets. For a list of these commands, type help or \h at the mysql> prompt: mysql> help List of all MySQL commands: ...
https://dev.mysql.com/innodb-parameters.html
The slow shutdown can take minutes, or even hours in extreme cases where substantial amounts of data are still buffered. Generally, the combined size of the log files should be large enough that the server can smooth out peaks and troughs in ...
https://dev.mysql.com/flush.html
This enables clients that have reached their hourly connection, query, or update limits to resume activity immediately. | tables_option } flush_option: { BINARY LOGS | ENGINE LOGS | ERROR LOGS | GENERAL LOGS | HOSTS | LOGS | PRIVILEGES | ...
https://dev.mysql.com/controlling-query-plan-evaluation.html
Because the difference in performance between “good” and “bad” plans can be orders of magnitude (that is, seconds versus hours or even days), most query optimizers, including that of MySQL, perform a more or less exhaustive search for an ...
https://dev.mysql.com/converting-tables-to-innodb.html
When loading large volumes of data with a sequence of INSERT statements, periodically COMMIT the results to avoid having transactions that last for hours. If an ALTER TABLE operation runs out of space, it starts a rollback, and that can take hours ... If you have MyISAM tables that you want to convert to InnoDB for better reliability and scalability, review the following guidelines and tips before ...
https://dev.mysql.com/create-user.html
CREATE USER permits these resource_option values: MAX_QUERIES_PER_HOUR count, MAX_UPDATES_PER_HOUR count, MAX_CONNECTIONS_PER_HOUR count For all accounts named by the statement, these options restrict how many queries, updates, and connections to ...
https://dev.mysql.com/thread-pool-tuning.html
In the worst case, this could take hours or even days. Suppose a server executes a workload where 99.9% of the statements complete within 100ms even when the server is loaded, and the remaining statements take between 100ms and 2 hours fairly evenly ... This section provides guidelines on setting thread pool system variables for best performance, measured using a metric such as transactions per ...
https://dev.mysql.com/error-log-rule-based-filtering.html
This rule throttles errors and warnings to 1000 per hour and information messages to 100 per hour: IF prio <= INFORMATION THEN throttle 1000/3600 ELSE throttle 100/3600. The log_filter_dragnet log filter component enables log filtering based on ...
https://dev.mysql.com/alter-user.html
ALTER USER permits these resource_option values: MAX_QUERIES_PER_HOUR count, MAX_UPDATES_PER_HOUR count, MAX_CONNECTIONS_PER_HOUR count For all accounts named by the statement, these options restrict how many queries, updates, and connections to the ... ALTER USER [IF EXISTS] user [auth_option] [, user [auth_option]] ...
https://dev.mysql.com/group-replication-options.html
To avoid unnecessary expulsions on slower networks, or in the case of expected transient network failures or machine slowdowns, you can specify a timeout value greater than zero, up to a maximum of 3600 seconds (1 hour). The ... This section lists ...
Document created the 26/06/2006, last modified the 26/10/2018
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