Identify a performance impact when using the Performance Schema.（）<br>A:There is no impact on performance<br>B:The overhead depends on the settings of the Performance Schema<br>C:There is an overhead for querying the Performance Schema but not for having it enabled<br>D:There is a constant overhead regardless of settings and workload

Identify a performance impact when using the Performance Schema.（）
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

出自：Oracle认证

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