zram, anyone have an opinion on this?

[cvevans]

.
@ Blacksimon

... 2. Establish a zram set-up using 3/4 the ram as zram:
echo $((384*1024*1024))>/sys/block/zram0/disksize
mkswap /dev/zram0
swapon -p 100 /dev/zram0

3. Bring in LibreOffice and IceWeasel
(without zram, my mem used would be about 807M with
just these two and lxterminal)

4. Switch from one to the other of these; when you switch,
give each something new to do.

5. Examine free from time to time.

6. Bring in some more programs, check free again.

Can I use this to shrink the existing zram0 on K703?
Can I modprobe to add a second, smaller zram0? How?
I am concerned about running out of memory; I already see long pauses, especially when the system suddenly decided to put 1G into the empty zram swap.
What happens if I put 1G of .debs into the ramdisk? They are compressed; will I lose that 1G of RAM? Do I get it back if I swapoff /dev/zram0?
I have searched the web, so far with no details found.
Thanks