This question already has an answer here:
I have an SSD and therefore no swap. However, when I open a lot of tabs in the browser, the system tends to grind to a halt. If I'm lucky, I can close one or two tabs before the system is completely unresponsive. Is it possible to use the OOM in this case to kill a few browser processes (chromium) to avoid the unresponsiveness? There is still a bit of memory available, but apparently there's still a resource conflict.