1MB swap partition on 11.0 memstick

[Ian Smith]

G'day,

root at x200:~ # mdconfig -lv
md0     vnode     700M  
/home/smithi/FreeBSD-11.0-RELEASE-amd64-memstick.img
root at x200:~ # gpart show -p md0
=>      3  1433741    md0  GPT  (700M)
        3     1600  md0p1  efi  (800k)
     1603      125  md0p2  freebsd-boot  (62k)
     1728  1429968  md0p3  freebsd-ufs  (698M)
  1431696     2048  md0p4  freebsd-swap  (1.0M)

What is the 1.0M swap partition for?  Is it needed by bsdinstall?

I have an MBR-scheme sliced memstick using boot0 with that md0p3 dd'd to 
da0s2a which boots fine, but have only run it as 'Live CD' and have not 
run the installer, but am wondering if a) that swap partition is really 
needed and if so, b) what can usefully be done with 1MB of swap ..

cheers, Ian