MySQL 8.4 Release Notes
这些状态发生在事件调度器线程上，即为执行计划事件而创建的线程，或终止调度器的线程上。These states occur for the Event Scheduler thread, threads that are created to execute scheduled events, or threads that terminate the scheduler.
调度程序线程或正在执行事件的线程正在终止，并且即将结束。The scheduler thread or a thread that was executing an event is terminating and is about to end.
调度器线程或执行事件的线程已被初始化。The scheduler thread or a thread that executes an event has been initialized.
Waiting for next activationWaiting for next activation调度器有一个非空的事件队列，但下一个激活将在将来发生。The scheduler has a nonempty event queue but the next activation is in the future.
Waiting for scheduler to stopWaiting for scheduler to stop线程发出了
SET GLOBAL event_scheduler=OFF并正在等待调度器停止。The thread issuedSET GLOBAL event_scheduler=OFFand is waiting for the scheduler to stop.Waiting on empty queueWaiting on empty queue调度器的事件队列为空，它正在休眠。The scheduler's event queue is empty and it is sleeping.