How do you calculate that? And as a follow up are all your tablespaces bigfile? On 19 Jan 2011 15:54, "Hemant K Chitale" <hemantkchitale@xxxxxxxxx> wrote: It is acceptable to have more than datafile for SYSTEM. Technically, this adds one more point of failure : "there's a higher probability of an administrator mistakenly removing any 1 of 2 files than 1 of 1 file". Hemant K Chitale http://hemantoracledba.blogspot.com sent from my smartphone > > On Jan 19, 2011 3:44 PM, "Sheldon Quinny" <sheldonquinny@xxxxxxxxx> wrote: > > Hi Folks, > > I ...