Which two statements are true regarding the Average Active Sessions chart on the performance page
A.
It shows active aggregate wait class statistics across all the instances In the cluster database.
B.
It shows active aggregate wait class per instance for all the instances In the cluster database.
C.
If the Average Active Sessions chart displays a large number of sessions waiting, indicating internal contention, but the throughput is high, then the situation may be acceptable.
D.
If the Average Active Sessions chart displays a large number of sessions waiting, indicating internal contention, but the throughput is low, then the CPU needs to be upgraded
http://docs.oracle.com/cd/B19306_01/rac.102/b14197/monitor.htm
At the cluster database level, this chart shows the aggregate wait class statistics across all of the instances.
If the Average Active Sessions chart displays a large number of sessions waiting, indicating internal contention, but throughput is high, then the situation may be acceptable.