Which three are true about monitoring waits for sessions and services?
(Choose three.)
A.正确答案BCFV$SESSION_EVENT displays all waits for all past and existing sessions if the
Wait has occurred at least once for a session.
B.V$SERVICE_EVENT displays all waits for all services if the wait has occurred at
Least once for a service.
C.V$SESSION_WAIT _CLASS displays waits broken down by wait class only for
Waiting sessions.
D.V$SESSION_WAIT and V$SESSION both contain details of the event on which
A non-waiting session last waited.
E.V$SESSION_EVENT displays all waits for all past sessions if the wait has
Occurred at least once for a session. F.V$SESSION_WAIT and V$SESSION both contain details of the event on which a
Session is currently waiting.
