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I have 8GB RAM, when memory is exceeded (chrome + vbox + something else):

  1. hard mouse freezes
  2. permanently lit SSD led
  3. in 90% of cases I can't login in tty, system without any response, necessary to reset only
  4. in 10% I login in tty and kill chrome or vbox and system is back to life

I run free -m every 2 seconds, and specifically fill all RAM, when free swap begins to decrease - it happens. The same thing happens with disabled swap, when free memory is decreasing to zero.

Other devices with Ubuntu 14.04, and 12.04 have same problem.

How I can solve this?

Linux E5550 3.19.0-49-generic #55~14.04.1-Ubuntu SMP Fri Jan 22 11:24:31 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
andrew.46
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user2083894
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  • when memory is involved: start by checking if the modules are perfect. But ... a "hard" freeze to me means a keyboard lock and requiring a reboot ;-) If the system sort of still works (but slow) you can also start "top" on a tty and check what is hogging the system (I would asssume either chrome or vbox and not both(?)) – Rinzwind Feb 14 '16 at 22:56
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    How much main memory (RAM+swap) does your system have in total (see /proc/meminfo)? Is the swap space on a reasonably fast storage medium? What are the values of other relevant virtual memory management parameters like vm.swappiness? – David Foerster Feb 14 '16 at 23:03
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    good idea would probably be to increase swappines and amount of swap – Sergiy Kolodyazhnyy Feb 15 '16 at 00:44
  • @Rinzwind, yes. I can't login in tty even – user2083894 Feb 22 '16 at 14:59
  • @DavidFoerster, vm.dirty_writeback_centisecs = 6000 vm.swappiness = 15 vm.dirty_background_ratio = 50 vm.laptop_mode=0 vm.dirty_ratio=10 vm.dirty_background_ratio=10 vm.drop_caches=3

    $ free -m
    total used free shared buffers cached
    Mem: 7879 7523 355 711 252 2141
    -/+ buffers/cache: 5129 2749
    Swap: 8083 411 7672

     – user2083894 Feb 22 '16 at 15:01
  • Please [edit] your question, when you want to add information. Especially file or program output listings (with the help of the {} button in the editor toolbar) are much more readable there and overall it's best to have everything relevant in one place. Also, comments may be deleted for various reasons. – David Foerster Feb 22 '16 at 17:46
  • How big is the Virtual Machine .On my 6GB RAM PC with no swap I can run 2GB VirtualBox and Unity3D and blender .RAM usage is about 5GB.It never froze up because of RAM. – Suici Doga Mar 07 '16 at 13:15
  • I have exactly this same problem. In my case usually when multiple applications are open and I start to build C++ code in Qt Creator something bad happens. Effectively it feels like a fork bomb. – juzzlin Apr 19 '16 at 13:54
  • Shouldn't the program requesting the ram amount that exceeds the limits crash, instead of the whole system freezing? – Noob Doob Sep 10 '16 at 15:10

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