If Oracle really is taking 630M at startup, I would look at your kernal parameters. You may have the minimum shared memory segment at 640M or something.
[/B][/QUOTE]

Thanks for your reply, this is the first time I install Oracle on Linux environement so I don't know much about the Unix side. per your advise, I might have the minimum shared memory segment at 640M or something, how to I check that??? What do I need to do ???

Please help me b/c I want to learn more about Unix.

Thanks so much Jeff