View the Exhibit and examine the resource consumption details for the current plan in use by the database
instance.
Which two statements are true based on the output? (Choose two.) Exhibit:
A.
An attempt to start a new session by the user belonging to DSS_QUERIES fails with an error
B.
A user belonging to DSS_QUERIES can log in to a new session but the session will be queued
C.
The CPU_WAIT_TIME column indicates the total time that sessions in the consumer group waited for the
CPU due to resource management
D.
The CPU_WAIT_TIME column indicates the total time that sessions in the consumer group waited for the
CPU due to resource management, I/O waits, and latch or enqueue contention
Explanation:
V$RSRC_CONSUMER_GROUP Use the V$RSRC_CONSUMER_GROUP view to monitor resources
consumed, including CPU, I/O, and parallel servers. It can also be used to monitor statistics related to CPU
resource management, runaway query management, parallel statement queuing, and so on. All of the statistics
are cumulative from the time when the plan was activated.
SELECT name, active_sessions, queue_length,
consumed_cpu_time, cpu_waits, cpu_wait_time
FROM v$rsrc_consumer_group;
In the preceding query results, the DSS_QUERIES consumer group has four sessions in its active session pool
and two more sessions queued for activation.
A key measure in this view is CPU_WAIT_TIME. This indicates the total time that sessions in the consumer
group waited for CPU because of resource management. Not included in this measure are waits due to latch or
enqueue contention, I/O waits, and so on.
