New Background Processes that has been introduced from 12c, compared with 11.2.0.2 Database.
| 12 C | Process Name |
| AQPC | AQ Process Coordinator |
| ARSn | ASM Recovery Slave Process |
| BWnn | Database Writer Process |
| FENC | Fence Monitor Process |
| IPC0 | IPC Service Background Process |
| LDDn | Global Enqueue Service Daemon Helper Slave |
| LGnn | Log Writer Worker |
| LREG | Listener Registration Process |
| NSSn | Network Server SYNC Process |
| OFSD | Oracle File Server Background Process |
| QMnn | AQ Master Class Process |
| RM | RAT Masking Slave Process |
| RMON | Rolling Migration Monitor Process |
| RPOP | Instant Recovery Repopulation Daemon |
| SAnn | SGA Allocator |
| SCCn | ASM Disk Scrubbing Slave Check Process |
| SCRB | ASM Disk Scrubbing Master Process |
| SCRn | ASM Disk Scrubbing Slave Repair Process |
| SCVn | ASM Disk Scrubbing Slave Verify Process |
| TTnn | Redo Transport Slave Process |
| VUBG | Volume drive Umbilicus Background |
Source:- http://docs.oracle.com/cd/E16655_01/server.121/e17615/bgprocesses.htm
Some of the parameters that names have been changed, for example NSA1 (Redo transport services has been named as TTnn etc)
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