oracle 11g background process
oracle background process are required to stay the database up and running on this instance.
to see oracle background process
ps -ef | grep ora_
oracle process naming structure - ora_process name_instance name
Database writer (DBWn) = Writes modified data from the buffer cache to disk (datafiles)
Log writer (LGWR) = Writes redo log buffer contents to the online redo log files
Checkpoint (CKPT) = Updates the headers of all datafiles to record the checkpoint details
Process monitor (PMON) = Cleans up after finished and failed processes
System monitor (SMON) = Performs crash recovery and coalesces extents
Archiver (ARCn) = Archives filled online redo log files
Manageability monitor (MMON) = Performs database-manageability-related tasks
Manageability monitor light (MMNL) = Performs tasks like capturing session history and metrics
Memory manager (MMAN)= Coordinates the sizing of the SGA components
Job queue coordination process (CJQO)= Coordinates job queues to expedite job processes