Concurrent Programming: Linux Memory

While I finish the blogger version, you can have a look at the original entry in my GitHub account.

TL;DR:

One practical take home message is this:
When using top in Linux, it's not meaningfull to add the RES value of different processes as that does not amount to the actual, combined physical memory used by all of them. It's also not meaningful to add the values of USED for different processes; neither is it to add the values of RSsh: They do not account for independent chunks of physical memory; we are overcounting in general!
See the examples in that post.