Answer Posted / cspriyadba

Oracle Instance constits of on

Memory Structure and Background Process

* Memory structure constists of SGA and PGA

=>SGA constists of
1)Shared Pool
2)Database Buffer Cache
3)Redo log Buffer
4)Java Pool
5)Large Pool

=>PGA constists of
1)Server Process
2)User Process

* Background Process constists of

1)PMON
2)SMON
3)DBWR
4)LGWR
5)CKPT
6)Others

and optional Bg process also there
RECO,QMNn,ARCn,LCKn,LMDn,Snnn,Pnnn etc..

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