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 System Architecture  |  Question 26 of 33    Print  
What is the function of Dispatcher (Dnnn) ?
Dispatcher   (Dnnn)  process  is  responsible  for  routing  requests  from connected user processes to available shared server processes and returning the responses back to the appropriate user processes.



  
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DBWR - Database Writer.LGWR - Log WriterCKPT - Check PointSMON - System MonitorPMON - Process MonitorARCH - ArchiverRECO - RecoverDnnn - Dispatcher, andLCKn - LockSnnn - Server. 
Latest Answer : Mandatory Processes DBWR - Database Writer.LGWR - Log WriterCKPT - Check PointSMON - System MonitorPMON - Process Monitor Optional Process ARCH - ArchiverRECO - RecoverDnnn - Dispatcher, andLCKn - LockSnnn - Server. ...
The Checkpoint (CKPT) process is responsible for signaling  DBWR  at checkpoints  and updating all the data files and control 
Latest Answer : Ckpt (checkpoint) is a background process. It synchronize SCN of all the database files like datafiles, control files and redo log files. ...
Process Monitor (PMON)  performs process recovery when a user process fails PMON  is  responsible  for cleaning up the cache and Freeing resources that the  process  was using 
Archiver  (ARCH) copies the on-line redo log files to archival storage when they  are  full.  ARCH is active only when a database's redo log is used in ARCHIVELOG mode. 
RECOver (RECO) is used to resolve distributed transactions that are pending due  to  a  network  or  system failure in a distributed database. At timed intervals,the  local  
Dispatcher   (Dnnn)  process  is  responsible  for  routing  requests  from connected user processes to available shared server processes and returning the 
Atleast one Dispatcher process is created for every communication protocol in use. 
Lock  (LCKn)  are  used for inter-instance locking when the ORACLE Parallel Server option is used. 

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