Hey!
Processor Pool means memory that is going to be used by the CPU for storing process information (like normally in RAM on a PC)..
I/O Pool is used to buffer packets sent from and to the CPU (management traffic / controle plane traffic)..
So you have two different memory pools.
You just see the "total" value as 100%..
So for your Processor Memory in your example above, about 6.6% memory are utilized.
Let me know if that helps.
BR
Juls