What if max core set to 0 bytes

In abinitio What happens if max core set to 0 bytes? and I run the graph, still the graph work? If so how?

I dont know whether the graph runs or not but I am sure that performance eill be degraded.
If U set the max core as zero, its like U r trying to run a bike with zero lt petrol.
Will U be able to as fast as when u full tank petrol?
Similarly, if u set very high value to the max core, Soooo many computer resources will be allocated and excessive resources will be wasted.
So U need to set optimal max core = Size of input file + (Overheads in bytes)
Hope U understand my Abinitio Language.
Thanks