Thank you for the details.
In the end I set the paging to 1GB, better not taking any risks.
I read something about it online and you seem to confirm this.
The pagefile is better set on an SSD since more reads are involved, all goes well.
The system managed pagefile for 16GB RAM is bigger than 8GB if put on a HDD but it's about 5GB for an SSD, so it seems.
I hope the 1GB fixed size is enough, otherwise I'll increase it.
So far there were no issues (VirtualBox VM's were running not using more than 2GB so far), as you said, there is a possibility but depends on memory usage.