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https://dev.mysql.com/doc/refman/5.7/en/memory-use.html
For efficiency of high-volume read operations, the buffer pool is divided into pages that can potentially hold multiple rows. On systems with a large amount of memory, you can improve concurrency by dividing the buffer pool into multiple buffer pool ... MySQL allocates buffers and caches to improve performance of database ...
https://dev.mysql.com/doc/refman/5.7/en/midpoint-insertion.html
When using the midpoint insertion strategy, the LRU chain is divided into two parts: a hot sublist and a warm sublist. When an index block is read from a table into the key cache, it is placed at the end of the warm sublist. A block promoted into ...
https://dev.mysql.com/doc/refman/5.7/en/miscellaneous-optimization-tips.html
This section lists a number of miscellaneous tips for improving query processing speed: If your application makes several database requests to perform related updates, combining the statements into a stored routine can help performance. Similarly, ...The resulting fast database operations are then available to be reused by other queries, applications, and even code written in different programming ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-api-definition.html
(NDB 7.5.0) For queries that are translated into full table scans or range scans on indexes, it is important for best performance to fetch records in properly sized batches. Time elapsed during node connection attempts is not taken into account when ... The [mysqld] and [api] sections in the config.ini file define the behavior of the MySQL servers (SQL nodes) and other applications (API nodes) used to access cluster ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-cluster-replication-issues.html
If this occurs, it is entirely possible for new data to be inserted into the source cluster without being recorded in the source SQL node's binary log. This section discusses known problems or issues when using replication with NDB Cluster. A loss ...
https://dev.mysql.com/doc/refman/5.7/en/mysql-nutshell.html
JSON_MERGE_PATCH(), when used on 2 JSON objects, merges them into a single JSON object that has as members a union of the following sets: Each member of the first object for which there is no member with the same key in the second object. INTO ...
https://dev.mysql.com/doc/refman/5.7/en/mysqldumpslow.html
The MySQL slow query log contains information about queries that take a long time to execute (see Section 5.4.5, “The Slow Query Log”). mysqldumpslow parses MySQL slow query log files and summarizes their contents. Normally, mysqldumpslow ...
https://dev.mysql.com/doc/refman/5.7/en/nested-join-optimization.html
The result row is passed to the final check for the output or into the next nested loop, but only if the row satisfies the join condition of all embedded outer joins. The following discussion refers to the join syntax described in Section 13.2.9.2, ...
https://dev.mysql.com/doc/refman/5.7/en/numeric-type-attributes.html
When you insert a value of NULL into an indexed AUTO_INCREMENT column, the column is set to the next sequence value. (AUTO_INCREMENT sequences begin with 1.) Storing 0 into an AUTO_INCREMENT column has the same effect as storing NULL, unless the ...
https://dev.mysql.com/doc/refman/5.7/en/partitioning-list.html
List partitioning in MySQL is similar to range partitioning in many ways. As in partitioning by RANGE, each partition must be explicitly defined. The chief difference between the two types of partitioning is that, in list partitioning, each ...