Ray.nodes() is not showing me all available resources

I have 2 nodes in my windows os and 72 cpus but ray.nodes() shows only one node.
my program utilizes 36 cpus 100% but remaining 36 are not being utilized.

Can you say more about what you mean by you have 2 nodes in your “windows os”? do you have 2 separate machines?

no i have1 machine but 2 processors

you mean you call ray start twice from the same machine?