/boot/cmdline.txt and set the value to
Not able to Download Docker Images
That was a hard one to fix.
sudo sysctl -w net.ipv4.tcp_mtu_probing=1
To make this change permanently and survive a reboot add this line to the following file
/etc/sysctl.conf set the swappiness to 1:
vm.swappiness = 1
This means, that swapping will only start when the RAM consumption exceeds 99%.