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https://dev.mysql.com/doc/refman/5.7/en/show-engine.html
SHOW ENGINE engine_name {STATUS | MUTEX} SHOW ENGINE displays operational information about a storage engine. The statement has these variants: SHOW ENGINE INNODB STATUS SHOW ENGINE INNODB MUTEX SHOW ENGINE PERFORMANCE_SCHEMA STATUS SHOW ENGINE ...
https://dev.mysql.com/doc/refman/5.7/en/stored-programs-logging.html
The binary log contains information about SQL statements that modify database contents. This information is stored in the form of “events” that describe the modifications. (Binary log events differ from scheduled event stored objects.) The ...
https://dev.mysql.com/doc/refman/5.7/en/sys-statement-analysis.html
The statement_analysis and x$statement_analysis views have these columns: query The normalized statement string. db The default database for the statement, or NULL if there is none. full_scan The total number of full table scans performed by ...
https://dev.mysql.com/doc/refman/5.7/en/semijoins.html
It must not be implicitly grouped (it must contain no aggregate functions). FirstMatch: When scanning the inner tables for row combinations and there are multiple instances of a given value group, choose one rather than returning them all. A ...
https://dev.mysql.com/doc/refman/5.7/en/internal-temporary-tables.html
Evaluation of statements that contain an ORDER BY clause and a different GROUP BY clause, or for which the ORDER BY or GROUP BY contains columns from tables other than the first table in the join queue. In some cases, the server creates internal ...
https://dev.mysql.com/doc/refman/5.7/en/using-encrypted-connections.html
Several configuration parameters are available to indicate whether to use encrypted connections, and to specify the appropriate certificate and key files. This section provides general guidance about configuring the server and clients for encrypted ...
https://dev.mysql.com/doc/refman/5.7/en/commit.html
SET autocommit disables or enables the default autocommit mode for the current session. This means that, when not otherwise inside a transaction, each statement is atomic, as if it were surrounded by START TRANSACTION and COMMIT. You cannot use ...
https://dev.mysql.com/doc/refman/5.7/en/faqs-replication.html
In the following section, we provide answers to questions that are most frequently asked about MySQL Replication. Must the replica be connected to the source all the time? A.14.2. Must I enable networking on my source and replica to enable ...
https://dev.mysql.com/doc/refman/5.7/en/innodb-memcached-porting-mysql.html
Consider these aspects of memcached applications when adapting an existing MySQL schema or application to use the daemon_memcached plugin: memcached keys cannot contain spaces or newlines, because these characters are used as separators in the ...
https://dev.mysql.com/doc/refman/5.7/en/monitor-innodb-mutex-waits-performance-schema.html
A mutex is a synchronization mechanism used in the code to enforce that only one thread at a given time can have access to a common resource. When two or more threads executing in the server need to access the same resource, the threads compete ...