What is the RAM and disk space usage on default KDE installation?

In my case i had it like this:

# lsb_release -d
Description: Ubuntu 17.04

memory used
before: 119 MB
after: 1523 MB

disk space
before: /dev/sda2 20G 1.6G 17G 9% /
after: /dev/sda2 20G 5.7G 13G 32% /

I installed these packages and its dependencies using apt-get: kubuntu-desktop tightvncserver