Waiting for Slave Workers to free pending events

简介:

今天处理一个主备延迟的问题,看到有这个状态 ``` Slave_SQL_Running_State : Waiting for Slave Workers to free pending events ``` 除了大事务外,这个等待状态的意思是: 当事件的大小超过了slave_pending_jobs_size_max的大小,而当时间大小低于slave_pending_jobs_size_max的限制时调度器才会恢复调度。这种情况只会发生在slave_parallel_workers大于0时。 当 ``` stop slave; set global slave_parallel_workers=0; start slave; ```

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