If you need to use all the memory then swapping breaks down, best you can do is try to divide the work so half can be done, then you completely swap all the mem

If you need to use all the memory then swapping breaks down, best you can do is try to divide the work so half can be done, then you completely swap all the memory and do the other half. Also PCIe is (relatively) slow for moving gigabytes of data back and forth.