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Thread: Adding More RAM Problem

  1. #1
    Join Date
    Mar 2008

    Adding More RAM Problem

    I am running Ubuntu 9.04 as my host (yeah, I known, but this suits
    me fine). I just upgraded my laptop from 3GB to 4GB, Looking at
    the Settings on booting up, I see 4096 MB. So that is fine.

    I am running Oracle VirtualBox as a VM Manager and Windows 2000
    Pro under that as a client. I went to check my Systems settings,
    and VirtualBox still reports 3072 MB as its cap. I don't know
    how to check or resize the RAM available under Ubuntu. And I
    don't know if there is a special case of getting VirtualBox to
    recognize it if it is changed.

    With 4GB of RAM, I can better balance memory needs for the host
    and for the client. So I would like to solve this problem.
    Any ideas?

  2. #2
    Join Date
    Aug 2009
    Xubuntu 14.04 Trusty Tahr

    Re: Adding More RAM Problem

    Are you running 32 bit Ubuntu 9.04?

    32 bit OS's can only recognise between 3 and 3.5 gb of RAM, regardless of how much is physically in the machine. And thus Virtualbox will only see that amount too.

    To see more than that, you need a 64 bit OS.

    Last edited by motorcity909; October 9th, 2012 at 11:14 PM. Reason: grammar corrected
    AMD Bulldozer FX-4100 Quad Core @ 3.6GHz, NVidia GT430, Asus M5A78L-M LX, 8GB DDR3, Western Digital Green 1TB SATA2 hard-drive

  3. #3
    Join Date
    Apr 2007
    Hartford City, Indiana US
    Ubuntu Mate Development Release

    Re: Adding More RAM Problem

    A pae kernel will also get all your RAM recognized.

  4. #4
    Join Date
    Feb 2009
    Dallas, TX
    Ubuntu 16.04 Xenial Xerus

    Re: Adding More RAM Problem

    Moved to General Help.

  5. #5
    Join Date
    Feb 2005
    Melbourne, Australia
    Ubuntu 14.04 Trusty Tahr

    Re: Adding More RAM Problem

    Quote Originally Posted by exploder View Post
    A pae kernel will also get all your RAM recognized.
    Which is fairly useless in this situation. PAE only allows each 32-bit process to see up to the 4GB address space hard limit, and since part of that address space is also used by other hardware resources it will always be well under 4GB which is why Virtualbox - a single process - only "sees" what it now reports.

    The OP has to live with what he has.
    Regards, David.
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