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https://dev.mysql.com/doc/refman/8.0/en/innodb-performance-read_ahead.html
You control when InnoDB performs a read-ahead operation by adjusting the number of sequential page accesses required to trigger an asynchronous read request, using the configuration parameter innodb_read_ahead_threshold. For example, if you set the ... A read-ahead request is an I/O request to prefetch multiple pages in the buffer pool asynchronously, in anticipation of impending need for these ...
https://dev.mysql.com/doc/refman/8.0/en/json-table-functions.html
Saving an object or array triggers the optional on error clause; this also occurs when an error takes place during coercion from the value saved as JSON to the table column, such as trying to save the string 'asd' to an integer column. This clause ... This section contains information about JSON functions that convert JSON data to tabular ...
https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-added-deprecated-removed.html
ReservedFiredTriggers: Number of triggers having dedicated resources on one data node. MaxNoOfFiredTriggers: Total number of triggers that can fire simultaneously on one data node. ndb_metadata_sync: Triggers immediate synchronization of all changes ...Parameters Introduced in NDB 8.0 The following node configuration parameters have been added in NDB ...
https://dev.mysql.com/doc/refman/8.0/en/replication-features-invoked.html
Replication of invoked features such as loadable functions and stored programs (stored procedures and functions, triggers, and events) provides the following characteristics: The effects of the feature are always replicated. The following ...Note ...
https://dev.mysql.com/doc/refman/8.0/en/replication-gtids-restrictions.html
Also be aware that triggers that are defined to operate on nontransactional tables can be the cause of these problems. When binlog_format is set to STATEMENT, CREATE TEMPORARY TABLE and DROP TEMPORARY TABLE statements cannot be used inside ...
https://dev.mysql.com/doc/refman/8.0/en/replication-options-binary-log.html
For details of how stored programs (stored procedures and functions, triggers, and events) are handled when each binary logging format is set, see Section 27.7, “Stored Program Binary Logging”. There are exceptions when you cannot switch the ...
https://dev.mysql.com/doc/refman/8.0/en/server-status-variables.html
Innodb_buffer_pool_dump_status The progress of an operation to record the pages held in the InnoDB buffer pool, triggered by the setting of innodb_buffer_pool_dump_at_shutdown or innodb_buffer_pool_dump_now. Innodb_buffer_pool_load_status The ...
https://dev.mysql.com/doc/refman/8.0/en/server-system-variables.html
Note Setting foreign_key_checks to 1 does not trigger a scan of the existing table data. However, if you have many large triggers on your tables that cause a high memory load, the default setting for table_open_cache_instances might lead to ... The ...
https://dev.mysql.com/doc/refman/8.0/en/sql-prepared-statements.html
SQL syntax for prepared statements can be used within stored procedures, but not in stored functions or triggers. Using prepared statements with placeholders for parameter values has the following benefits: Less overhead for parsing the statement ...
https://dev.mysql.com/doc/refman/8.0/en/sys-ps-setup-show-disabled.html
Displays all currently disabled Performance Schema configuration. Parameters in_show_instruments BOOLEAN: Whether to display disabled instruments. This might be a long list. in_show_threads BOOLEAN: Whether to display disabled threads. Example ...