Swap space in raspberrypi armhf image

Support & Help Requests Raspberry Pi
#1

I have installed the Ubuntu MATE 18.04.2 armhf image on a raspberry pi 3b+ on a 16gb sdcard. After I finished setting up I noticed that the OS only had 128MB of swap available. This looks like it's not enough, so I have two questions:

  1. How do I increase swap space available?
  2. Do I need to make a bug report about this, and if so how?
#2

It is very simple, follow this guide: https://bogdancornianu.com/change-swap-size-in-ubuntu/
In the guide it is setting 8 GB
sudo dd if=/dev/zero of=/swapfile bs=1G count=8
I personally used 4:

sudo swapoff -a
sudo dd if=/dev/zero of=/swapfile bs=1G count=4
sudo mkswap /swapfile
sudo swapon /swapfile
#3

I found leaving swap alone & using ZRAM gave better results article here https://www.cnx-software.com/2018/05/14/running-out-of-ram-in-ubuntu-enable-zram/