you can increase swap easily because you are using swapfile:
remove current small file 512MB:
sudo swapoff /swapfile
sudo rm -f /swapfile
create a new one:
sudo dd if=/dev/zero of=/swapfile bs=1M count=16000 status=progress
16000=16GB
set permission:
sudo chmod 600 /swapfile
create swapfile:
sudo mkswap /swapfile
start it:
sudo swapon /swapfile
check it:
swapon --show