I have a Fedora 21 on my notebook and it sometimes runs out of memory. The notebook has 4GB of system RAM and the OS takes up only about 450MB of disk space.
I am sure that the culprit is Chromium; which seems to have memory leaks. The problem is that the OS freezes and only hard restart works. I found some info about “Out Of Memory” killer, but it was mostly server stuff.
What is the best approach to this problem on workstations?