https://dev.mysql.com/doc/refman/5.7/en/innodb-storage-engine.html
InnoDB Locking
MySQL 5.6 Reference Manual/14.7.1 InnoDB Locking
WIP ! INNODB LOCKING
查看 InnoDB 状态
MySQL 5.6 Reference Manual/The InnoDB Storage Engine/InnoDB Monitors
MySQL 5.6 Reference Manual/…/SHOW ENGINE Syntax
WIP ! SHOW ENGINE STATUS