I installed mint recently and like all the other distros when I use my download helper to download streaming video's it uses java and slows or locks up my system after a while. Now I was so pissed I couldn't find a free memory program like in windows. Well I finally believe I found the answer and I just did this and if it's bullshit I'll update and if it's awesome I'll also update. Enable zswap in linux. It's for low memory systems but I have 8gb ram 16gb swap and a separate 30gb temp and still froze up so here's the page and you can do some research of your own to see if it's something worth using. https://www.maketecheasier.com/use-zswap-improve-old-linux-performance/