There isn't quite a way to calculate the # maxextents. Typically, this is set to a high value. If you do not specify the # maxextents, then each of the rbs will end up having the default value, ie, the value of maxextents of the tablespace. If the ts or rbs value of the maxextents is low, and say a large transaction takes up the no. of maxextents defined (either for the rbs or the ts), the transaction would fail.

[Edited by Halo on 10-03-2001 at 09:30 PM]