Hello Osman,
As I understood from your query is that there is a background process which is in status ON HOLD with reason RFC because of this the system is not available. Now you want to know whether the system was working fine before this work process starts. Am I right ?
If so you can go to the details of the process and check when it was started and all details.
To terminate the work process, select the work process and goto process menu ---> Select "Cancel without core"
Regards,
Thanga