yes Ubuntu 20.04 hangs freeze although I have 8 GB of Ram and i7
I could temporary fix this issue in my side, by expanding swap partition from 2 GB to 16 GB
I am not sure but I think there is problem in Ubuntu 20.04 memory management, here in my side it keep consuming memory, then when both memory and swap are full, the computer start to freeze and hang
the solution steps are:
1- check the amount of swap you have
grep SwapTotal /proc/meminfo
2-turn off the swap process
sudo swapoff -a
3-resize the swap(in my case i expand it to 16 gb)
sudo dd if=/dev/zero of=/swapfile bs=1G count=16
4- attach the swap to partition
sudo mkswap /swapfile
5- activate swap(enable it)
sudo swapon /swapfile
6- see the new swap size
grep SwapTotal /proc/meminfo
done