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https://dev.mysql.com/doc/refman/9.7/en/error-log-rule-based-filtering.html
This rule throttles errors and warnings to 1000 occurrences per hour and information messages to 100 occurrences per hour: IF prio <= INFORMATION THEN throttle 1000/3600 ELSE throttle 100/3600. The log_filter_dragnet log filter component enables ...
https://dev.mysql.com/doc/refman/9.7/en/performance-schema-functions.html
MySQL includes built-in SQL functions that format or retrieve Performance Schema data, and that may be used as equivalents for the corresponding sys schema stored functions. The built-in functions can be invoked in any schema and require no ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-options-variables.html
Time values can be optionally suffixed with h (hours), m (minutes), or s (seconds). This section provides information about MySQL server options, server and status variables that are specific to NDB Cluster. For general information on using these, ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-programs-ndb-restore.html
Different offset values can also be used for different columns of the same table, like this: $> ndb_restore --restore-data --remap-column=hr.employee.salary:offset:10000 \ --remap-column=hr.employee.hours:offset:-10 When source backups contain ...
https://dev.mysql.com/doc/refman/9.7/en/mysql-cluster-replication-pitr.html
This backup should be updated regularly—perhaps even hourly—depending on your needs. Point-in-time recovery—that is, recovery of data changes made since a given point in time—is performed after restoring a full backup that returns the ...
https://dev.mysql.com/doc/refman/9.7/en/window-functions-usage.html
For example, if a table contains a TIMESTAMP column named ts, standard SQL permits PARTITION BY ts but not PARTITION BY HOUR(ts), whereas MySQL permits both. However, whereas an aggregate operation groups query rows into a single result row, a ...
https://dev.mysql.com/doc/refman/9.7/en/timestamp-lookups.html
(The example shown earlier illustrates how this can occur.) The query specifies a search value that is within the hour of entry into DST in the session time zone. Temporal values are stored in TIMESTAMP columns as UTC values, and values inserted ...
https://dev.mysql.com/doc/refman/9.7/en/mysqldump.html
For restore times measured in hours, you might prefer an alternative backup and restore solution, such as MySQL Enterprise Backup for InnoDB-only and mixed-use databases. The mysqldump client utility performs logical backups, producing a set of SQL ...
https://dev.mysql.com/doc/refman/9.7/en/optimizing-innodb-transaction-management.html
For example, an application might encounter performance issues if it commits thousands of times per second, and different performance issues if it commits only every 2-3 hours. To optimize InnoDB transaction processing, find the ideal balance ...
https://dev.mysql.com/doc/refman/9.7/en/partitioning-limitations-functions.html
This section discusses limitations in MySQL Partitioning relating specifically to functions used in partitioning expressions. Each of these functions returns an integer only if it is passed an argument of an exact numeric type, such as one of the ...