solid-state paging

[utzoo!decvax!ucbvax!unix-wizards]

>From decvax!utzoo!henry at Berkeley Tue Nov  3 00:06:48 1981
It is not clear that paging to a solid-state device is wonderful, unless
for architectural reasons the maximum main memory is too small (e.g.
18-bit PDP11's).  The paging/swapping device is logically an extension
of main memory:  why not just buy some more main memory?  Simpler, less
i/o traffic and system overhead, and probably cheaper (more vendors).
Such devices are TOO GOOD for backing store;  they are much better used
for root or /tmp, which are NOT logically just extensions of memory.