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https://dev.mysql.com/doc/refman/5.7/en/fulltext-natural-language.html
By default or with the IN NATURAL LANGUAGE MODE modifier, the MATCH() function performs a natural language search for a string against a text collection. A collection is a set of one or more columns included in a FULLTEXT index. For each row in the ...
https://dev.mysql.com/doc/refman/5.7/en/function-optimization.html
A function is nondeterministic if, given fixed values for its arguments, it can return different results for different invocations. If a function is tagged nondeterministic, a reference to it in a WHERE clause is evaluated for every row (when ...
https://dev.mysql.com/doc/refman/5.7/en/general-thread-states.html
The following list describes thread State values that are associated with general query processing and not more specialized activities such as replication. Many of these are useful only for finding bugs in the server. After create This occurs when ...
https://dev.mysql.com/doc/refman/5.7/en/group-by-optimization.html
The most general way to satisfy a GROUP BY clause is to scan the whole table and create a new temporary table where all rows from each group are consecutive, and then use this temporary table to discover groups and apply aggregate functions (if ...
https://dev.mysql.com/doc/refman/5.7/en/group-replication-user-credentials.html
Group Replication uses the asynchronous replication protocol to achieve Section 17.9.5, “Distributed Recovery”, synchronizing group members before joining them to the group. The distributed recovery process relies on a replication channel named ...
https://dev.mysql.com/doc/refman/5.7/en/information-schema-statistics-table.html
The STATISTICS table has these columns: TABLE_CATALOG The name of the catalog to which the table containing the index belongs. TABLE_SCHEMA The name of the schema (database) to which the table containing the index belongs. NON_UNIQUE 0 if the index ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-buffer-pool-optimization.html
InnoDB maintains a storage area called the buffer pool for caching data and indexes in memory. Knowing how the InnoDB buffer pool works, and taking advantage of it to keep frequently accessed data in memory, is an important aspect of MySQL tuning.
https://dev.mysql.com/doc/refman/5.7/en/innodb-enabling-monitors.html
When InnoDB monitors are enabled for periodic output, InnoDB writes the output to mysqld server standard error output (stderr) every 15 seconds, approximately. InnoDB sends the monitor output to stderr rather than to stdout or fixed-size memory ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-memcached-internals.html
InnoDB API for the InnoDB memcached Plugin The InnoDB memcached engine accesses InnoDB through InnoDB APIs, most of which are directly adopted from embedded InnoDB. InnoDB API functions are passed to the InnoDB memcached engine as callback ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-memcached-setup.html
This section describes how to set up the daemon_memcached plugin on a MySQL server. Because the memcached daemon is tightly integrated with the MySQL server to avoid network traffic and minimize latency, you perform this process on each MySQL ...