Using an SSD as swap?

[jack-rp9/bkPP+cDYtjvyW6yDsg at public.gmane.org (Jack Coats)]

Unless it MUST be portable, if you have additional USB2 or firewire
ports available, an external device
might be the correct answer.   I could see someone (like me :) ) using
the 'Handyman's Secret Weapon'
(duct tape) to strap a USB drive on the back of a laptop ;)  But let's
not go there...

Back to what substitutes for reality:

You may have reached the practical limits of your machine.  I deal
with this all the time.  Sometimes
there is no real substitute for a 'fork lift upgrade' if you really
need to do more than your machine is
architecturally suited. ... Bummer.

The reason for using battery backup on even swap RAM disk is so it is
already formated the next
time you boot.  <war story>Back in the mainframe days and we had a RAM
box to page/swap from.
Every time we IPL'd (initial program load, like boot but older term),
we ran a program to format the
page space before we could bring it on-line.  Without battery it
wouldn't hold a charge and this device
didn't have a battery backup available.  I/O in those days is not
considered fast today, it was only
1.5MBytes/sec, but no framing or sync data, just 8 bits in parallel
down the 'buss and tag' cables.
Eventually mainframe internal i/o communication went to 3MB/sec, then
6, and I don't know what
the fiber ESCON channels (or whatever is newer) do today.  Basically
mainframe were I/O
war horses.</war story>