Hi Oraclegirl,

By looking in to the "archive log list", i can say that archive log mode is enabled to the location USE_DB_RECOVERY_FILE_DEST with some specified format ( Not listed).

1) The archive log stuff cannot run on any scheduler.
2) Whenever the redo logfile is filled, it automatically triggers archive log job (ARC) which will write the archive log file.
3) Whenever you use 'swtich log file' will trigger ARC.

I think this info helps you. If you have any query please let me know.

VJ
DBA