Archive log increase abnormal

database version : 11.2.0.4

I enabled data guard in production DB on 6/22, but the archive logs abnormal increased 62GB and  54GB on 6/24 , 7/3.

In normal, this DB generate archive log files about 2GB ~5GB / per day.

Checked no ORA error in alert log on this period and used Logminer to parse archive logs,

the most records are null and operation is INTERNAL.

I suspect resource manager issue, because huge archive log start at 10 pm, in this moment just only resource manager starting.

but i was disabled resource manager on 6/26

alter system set resource_manager_plan='' scope=both;

anyone can help me to solve this problem? if need more information, please tell me.