What's happening with 16.04 & 16.10? 100% of RAM being used by nothing!

[Ken D'Ambrosio]

You are almost certainly worrying over nothing. Unfortunately, your 'top' screens hot left out the right-hand side of the screen, but I imagine you will find your "missing" RAM allocated to caching, which the OS can use to speed things up, and reclaim dynamically as needed.

-Ken

On October 5, 2016 9:37:56 PM EDT, "Martinx - ジェームズ" <thiagocmartinsc at gmail.com> wrote:
>Guys,
>
>Something is happening with 3 Ubuntu Desktops that I have, 2 are 16.04,
>1
>is 16.10.
>
>Right after booting the machine, before even login into Unity via
>lightdm,
>I type "control + alt + f2" to login via console and.... 100% of my RAM
>is
>being used!
>
> But nothing is really using it!
>
> Where did my RAM went to?
>
> It is not lightdm or the GUI environment, I disable it by running
>"systemctl disable lightdm" and rebooted the desktop, right after login
>in,
>the RAM is all occupied.
>
>When I boot into the rescue mode, I can see that my RAM is free, normal
>boot, it is 100% occupied!
>
> * Rescue mode 127M being used:
>
> http://imgur.com/a/I4jmj
>
> * Normal boot (31016M being used!!!):
>
> http://imgur.com/a/BnllE
>
> I'm seeing exactly the same problems in 3 different computers!
>
> It is also, not systemd, I booted using Upstart, same results.
>
> Looks like that 16.10 is much worse than 16.04, I've just updated my
>Macbook Pro from 16.04, system is so slow that it is unusable, can't
>browse
>google.ca, for example... Feels like a 586.
>
>I'll try to boot a Linux kernel from Trusty (3.XX), on Xenial, to see
>if
>it better behaves.
>
> Any clue? Something is terrible wrong here...    :-/
>
>Cheers!
>Thiago
>
>
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