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https://dev.mysql.com/doc/refman/5.7/en/metadata-locking.html
Metadata locking applies not just to tables, but also to schemas, stored programs (procedures, functions, triggers, scheduled events), tablespaces, user locks acquired with the GET_LOCK() function (see Section 12.14, “Locking Functions”), and ...
https://dev.mysql.com/doc/refman/5.7/en/optimizing-subqueries.html
Using MySQL facilities like the BENCHMARK() function, you can get an idea about what helps in your own situation. MySQL replaces subqueries of the following form with an index-lookup function, which EXPLAIN describes as a special join type ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-hash.html
The most efficient hashing function is one which operates upon a single table column and whose value increases or decreases consistently with the column value, as this allows for “pruning” on ranges of partitions. Even so, YEAR(date_col) is a ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-key.html
Partitioning by key is similar to partitioning by hash, except that where hash partitioning employs a user-defined expression, the hashing function for key partitioning is supplied by the MySQL server. NDB Cluster uses MD5() for this purpose; for ...PARTITION BY KEY are similar to those for creating a table that is partitioned by ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-limitations-partitioning-keys-unique-keys.html
This section discusses the relationship of partitioning keys with primary keys and unique keys. The rule governing this relationship can be expressed as follows: All columns used in the partitioning expression for a partitioned table must be part ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-range.html
A table that is partitioned by range is partitioned in such a way that each partition contains rows for which the partitioning expression value lies within a given range. Ranges should be contiguous but not overlapping, and are defined using the ...
https://dev.mysql.com/doc/refman/5.7/en/performance-schema-transaction-tables.html
Stored Functions Stored functions are restricted from causing an explicit or implicit commit or rollback. Within the event hierarchy, wait events nest within stage events, which nest within statement events, which nest within transaction events.
https://dev.mysql.com/doc/refman/5.7/en/replication-features-current-user.html
In some cases, such as statements that change passwords, the function reference is expanded before it is written to the binary log, so that the statement includes the user name. For all other cases, the name of the current user on the source is ...
https://dev.mysql.com/doc/refman/5.7/en/replication-features-triggers.html
A statement invoking a trigger (or function) that causes an update to an AUTO_INCREMENT column is not replicated correctly using statement-based replication. If the trigger needs a single result value from the code, you can put the code in a stored ... With statement-based replication, triggers executed on the source also execute on the ...
https://dev.mysql.com/doc/refman/5.7/en/replication-options-source.html
This section describes the server options and system variables that you can use on replication source servers. You can specify the options either on the command line or in an option file. On the source and each replica, you must set the server_id ...