up to 3 copies of data (3*DataMemory)
+ 64MB * NoOfFragLogFiles (default=8)
+ UNDO log (dependent on update speed)
For example:
DataMemory=1024MB
idea on disk usage= 1024*3 + 64 * 8 =Â 3584MB + UNDO log
It’s very tempting to have a “SHOW ESTIMATES” command in the management client/server that performs all these equations (and the answers). I bet Professional Services would love me :)