单项选择题
A.There is no impact on performance
B.The overhead depends on the settings of the Performance Schema
C.There is an overhead for querying the Performance Schema but not for having it enabled
D.There is a constant overhead regardless of settings and workload
单项选择题 You are having problems with connections from a specific host (192.168.1.15) not closing down correctly. You want to find the state of the threads from that host check for long-running queries. Which statement will accomplish this?（）
单项选择题 Consider the Mysql Enterprise Audit plugin. Which statement is true when you identify a connection event that has used external authentication?（）
多项选择题 Consider the Mysql Enterprise Audit plugin. The following event detail is found in the audit log: Which two points can be concluded from the given event?（）