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https://dev.mysql.com/doc/refman/5.7/en/events-status-info.html
The Event Scheduler writes information about event execution that terminates with an error or warning to the MySQL Server's error log. See Section 23.4.6, “The Event Scheduler and MySQL Privileges” for an example. For frequently executed ...
https://dev.mysql.com/doc/refman/5.7/en/explain-for-connection.html
To obtain the execution plan for an explainable statement executing in a named connection, use this statement: EXPLAIN [options] FOR CONNECTION connection_id; EXPLAIN FOR CONNECTION returns the EXPLAIN information that is currently being used to ...
https://dev.mysql.com/doc/refman/5.7/en/faqs-stored-procs.html
Where can I find documentation for MySQL stored procedures and stored functions? A.4.3. Where can I find the ANSI SQL 2003 specification for stored procedures? A.4.5. Is there a way to view all stored procedures and stored functions in a given ...
https://dev.mysql.com/doc/refman/5.7/en/faqs-triggers.html
Where can I find the documentation for MySQL 5.7 triggers? A.5.2. Is there a way to view all triggers in a given database? A.5.7. Can a table have multiple triggers with the same trigger event and action time? A.5.11. Is it possible for a trigger to ...
https://dev.mysql.com/doc/refman/5.7/en/group-replication-replication-group-member-stats.html
The information is shared between all the server instances that are members of the replication group, so information on all the group members can be queried from any member. Each member in a replication group certifies and applies transactions ...
https://dev.mysql.com/doc/refman/5.7/en/identifiers.html
Certain objects within MySQL, including database, table, index, column, alias, view, stored procedure, partition, tablespace, and other object names are known as identifiers. Section 9.2.1, “Identifier Length Limits”, indicates the maximum ...
https://dev.mysql.com/doc/refman/5.7/en/index-page-merge-threshold.html
If the “page-full” percentage for an index page falls below the MERGE_THRESHOLD value when a row is deleted or when a row is shortened by an UPDATE operation, InnoDB attempts to merge the index page with a neighboring index page. The default ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-innodb-buffer-pool-stats-table.html
NUMBER_READ_AHEAD_EVICTED The number of pages read into the InnoDB buffer pool by the read-ahead background thread that were subsequently evicted without having been accessed by queries. The INNODB_BUFFER_POOL_STATS table provides much of the same ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-innodb-ft-being-deleted-table.html
The INNODB_FT_BEING_DELETED table provides a snapshot of the INNODB_FT_DELETED table; it is used only during an OPTIMIZE TABLE maintenance operation. When OPTIMIZE TABLE is run, the INNODB_FT_BEING_DELETED table is emptied, and DOC_ID values are ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-innodb-ft-config-table.html
The INNODB_FT_CONFIG table provides metadata about the FULLTEXT index and associated processing for an InnoDB table. Before querying it, set the value of the innodb_ft_aux_table system variable to the name (including the database name) of the table ...