Background processes in DBRM

Hi

i'm trying to implement a complex plan in our production database . I can't find where are defined the default consumer group for background processes .

I've mapped every user in the database into a defined consumer group , but in the night i see a lot of call into the OTHER_GROUP .

The maintenance window are mapped into a group called DBSNMP_RG . From my query the result is that the workload during the night depend from

background process

SQL> select consumer_group_id, count(*)

  2  from gv$active_session_history

  3  where session_type='BACKGROUND'

  4  group by consumer_group_id;

CONSUMER_GROUP_ID   COUNT(*)