I wouldn't be concerned about the "Recommended" value. That is just a value based on the size of RAM and is out of step with current pagefile sizing standards. A 64 GB pagefile (which you have) is very large and would be more that adequate for all but the most extreme workloads. Most people would be wishing to reduce the pagefile size, and by a considerable value. It is impossible to make any meaningful recommendations without knowing your workload. 64 GB RAM is very large and presumably you have a need for this.