>I tried a lot but failed to get the info
Looks like you could benfit from remedial training in web search techniques.
CKPT - Checkpoint process writes checkpoint information to control files and data file headers. ... MON - The Oracle 10g background process ...
www.dba-oracle.com/t_background_processes.htm www.dba-oracle.com/t_background_processes.htm · Save
You can lead some folks to knowledge, but you can not make them think.
The average person thinks he's above average!
For most folks, they don't know, what they don't know.
Good judgement comes from experience. Experience comes from bad judgement.