I was raeding this paper about space management suggested by somene here a few weeks back and I find this contradictory

Set a growth schedule for each segment in your database, and choose storage pa-rameters
that will cause Oracle Server to allocate extents on that schedule.
For any segment that grows continuously, you should choose storage parameters that moti-vate
Oracle Server to allocate a new extent to that segment about once every three to six
months.


Then it says


Oracle Server administrators still debate whether or not allowing a segment to have more
than one extent—“extent fragmentation”—is a harmful thing.



In the first place it says we should schedule for segment to grows every 3 to 6 months that means we have to use huge extent sizes.
In the second place it basically is saying dont care about number of extents therefore size of extents. Now ths is getting me confused...

What is this paper trying to suggest...?

Anyone have any thoughts?