Which two statements are true about Active Session History (ASH)? (Choose two.)
A.
The Data Sample size available in an ASH report is dynamic and, at any given moment, is directly related to
the amount of work being performed.
B.
ASH contains sampled data from all sessions that are connected to a database instance at any given
moment.
C.
ASH samples data from V$SESSION every second.
D.
An ASH report can be used to identify the service that may be the cause of a transient performance
problem.