Oracle 11g background processes

Oracle 11g process:

• smon
• lgwr
• dbwr (multiple process)
• chkpt
• pmon
• mmon
  • process to collect statistics for AWR
• mmnl
  • process to perform manageability related task
• mman
  • process to manage automatic shared memory
• pnnn (optional)
  • Process for parallel query operations
• vktm (Virtual keeper of time
  • Process tracks wall-clock time and is used as a reference time counter
• dia0
  • Diagnostic process to detects and resolve hangs and deadlocks
• diag
  • Diagnosability capture process for performing diagnostic dumps
• dbrm
  • Database resource management process
• psp0
  • Process spawner to spawn oracle process as needed
• reco
  • recoverer process
• d000
  • dispatcher process to listen to and receive request from connected sessions
• s0000
  • shared server process
• smco
  • Space management co-ordinator ...spawns wnnn proces to carry out the task
• fbda
  • flashback data archiver process
• cjq0
  • Job queue process used for batch processing
• gen0
  • General tak execution process
• qmnc
  • Advanced queing coordination process. Spawns Qnnn process as needed

For more information : http://download.oracle.com/docs/cd/E11882_01/server.112/e10820/bgprocesses.htm#REFRN104