To follow Oracle statistics daily execution :

 select * from DBA_AUTOTASK_CLIENT_HISTORY ;

 select * from DBA_AUTOTASK_JOB_HISTORY;
 select * from DBA_AUTOTASK_JOB_HISTORY where WINDOW_START_TIME > TO_DATE('27/02/19','DD-MM-YY') and client_name = 'auto optimizer stats collection';
 ALTER SYSTEM SET RESOURCE_MANAGER_PLAN = 'DEFAULT_MAINTENANCE_PLAN';
  exec DBMS_AUTO_TASK_IMMEDIATE.GATHER_OPTIMIZER_STATS;
 // see JOB_INFO column

Ex : ORA-29373: resource manager is not on