You can see resmgr:cpu quantum ( resource_manager_cpu_allocation ) wait event in Performance page of Oracle Enterprise Manager Cloud Control 13c.
resmgr:cpu quantum ( resource_manager_cpu_allocation ) Wait Event
When I take AWR ( Automatic Workload Repository ) report, I saw that There are resmgr:cpu quantum Wait Event in AWR.
resource_manager_cpu_allocation
To solve this problem, I have changed resource_manager_plan and cpu_count parameters like following.
SQL> show parameter resource
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
resource_limit boolean TRUE
resource_manager_cpu_allocation integer 56
resource_manager_plan string SCHEDULER[0x444D]:DEFAULT_MAIN
TENANCE_PLAN
SQL>
SQL> alter system set resource_manager_plan='' scope=both sid='*';
System altered.
SQL>
SQL>
SQL> show parameter resource
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
resource_limit boolean TRUE
resource_manager_cpu_allocation integer 56
resource_manager_plan string
SQL>
SQL>
SQL> show parameter cpu
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
cpu_count integer 8
parallel_threads_per_cpu integer 2
resource_manager_cpu_allocation integer 56
SQL>
SQL>
SQL> alter system set cpu_count=32 scope=both sid='*';
System altered.
SQL> show parameter cpu
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
cpu_count integer 32
parallel_threads_per_cpu integer 2
resource_manager_cpu_allocation integer 56
SQL>
SQL>
cpu_count parameter
I have increased cpu_count parameters from 8 to 32 then Scheduler and resmgr:cpu quantum Wait Event are disappeared.