This is a side question when I try to figure out why my Ubuntu18.04 server keeps using up memory and mysql gets killed from time to time.
total used free shared buff/cache available Mem: 3.9G 1.2G 142M 2.0G 2.5G 346M Swap: 511M 510M 2.0M
The above is the result of running "free" command. I've been trying to figure out how the numbers can be added up to the total(3.9g) to no avail. Can someone explain please?