Ubuntu 18.04 uses different amount of memory on different machines

Question

I have a 4GB machine, and when launching Ubuntu 18.04 (gnome) on this machine, it uses 1.4GB of ram just after booting.

I tried the same ISO on another machine with 8GB, and it uses 3.6GB of ram just after booting.

Why Ubuntu is having such behavior? Does Ubuntu do that to improve performance?

Thanks in advance.

3.6GB is a lot for just the OS. Probably you have something memory-intensive running, like a web browser. Did you check the System Monitor for details? — wjandrea, May 08 '18 at 18:07
it's a new installation, and I did the test just after the reboot, so I don't think there is processes that are eating memory. — Sidahmed, May 08 '18 at 18:08
Possibly useful: How do you find out which program is using too much memory? — wjandrea, May 08 '18 at 18:15

score 2 · Answer 1 · answered May 08 '18 at 16:19

2

You could get a hint of what is happening with memory in those systems with

top -o %MEM

With that command you will get all processes sorted by memory usage. Maybe the additionnal memory is used for buffering ?

answered May 08 '18 at 16:19

pmudry

1 Answers1