What is the Optimal Virtual Memory Size For 8 GB RAM | WIN 10?

I would like to ask experts that What is the optimal Virtual Memory Size For 8 GB RAM | WIN 10 and how you calculate?

I know the system says 1906 MB is recommended but is it enough or I should set it more?

Currently, my Virtual Memory size is 12 GB by the way but I feel it is useless.

Thanks in advance!