Hi Pavel
In simple and short ..
Role contains authorization objects..
Maximum limit of authorization objects for a role is 150 .
So a role can accommodate 150 authorization objects.
New Profile ABC is created , when ever you create a new role. 1-1 relation.
But if a role has more than 150 authorization objects .. then automatically a new profile ABC01 will be created and it will also be aligned to that role .
if role has 400 auth objects, then profiles will be ABC ,ABC01 ,and ABC02
i hope this helps you
Cheers
Pavan M