rw-lock
The low-level object that InnoDB uses to represent and enforce shared-access locks to internal in-memory data structures. Once the lock is acquired, any other process, thread, and so on can read the data structure, but no one else can write to it. Contrast with mutexes, which enforce exclusive access. Mutexes and rw-locks are known collectively as latches.
See also latch.
See also lock.
See also mutex.
See also Performance Schema.