Performance schema是用于监控Mysql执行,具有如下特征: 1.用于在运行时探查Mysql Server的执行过程,是由Performance_schema引擎和 Performance_schema库实现的,侧重于性能数据,而非元数据[INFORMATION_SCHEMA]. 2.Performance Schema监控Server Event.an event could be a function call, a wait for the operating system…