Even then you have to remember requirements change. Its not at all unusual for the later data to be not very similar to the initial load.... I have sometimes thought that reliable size estimates are as rare as unicorns... On 10/18/07, Dennis Williams <oracledba.williams@xxxxxxxxx> wrote: > > John, > > Agree with Jared. If you have a really large database, you need to get > some sample rows populated before you can start getting reliable estimates. > > Dennis Williams > > > -- Andrew W. Kerber 'If at first you dont succeed, dont take up skydiving.'