How does memory work on the Haswell MBPr?

Discussion in 'MacBook Pro' started by Hieveryone, Mar 21, 2015.

  1. Hieveryone macrumors 68040

    Apr 11, 2014
    I have a 13" MBPr late 2013 with 8 GB RAM.

    It says Physical Memory is 8.00 GB

    Memory Used: 6.68 GB

    Virtual Memory: 8.00 GB

    Swap Used: 0 bytes

    App Memory: 3.87 GB

    File Cache: 1.90 GB

    Wired Memory: 932.3 MB

    Compressed: 772 KB

    What does all this mean?
  2. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
  3. Freyqq macrumors 601

    Dec 13, 2004
    SWAP used is the storage space being used by the SSD to fill in for lack of ram. It is 0 MB, which means that the ram you have is covering all your uses. That's the only one on the list that really matters. The rest explain how your RAM is being used, for what purpose, and how much of it was compressed, etc.
  4. GGJstudios macrumors Westmere


    May 16, 2008
    It is quite normal for all of your memory to be in use by OS X. It does not mean that you are running out of memory or that it is maxed out. OS X will manage all available memory, making it available to apps on an as-needed basis. Refer to the following Apple support article for more information on how to understand your Activity Monitor readings.
  5. Meister Suspended


    Oct 10, 2013
    According to :apple: used swap is not necessarily a sign of lack of ram.
    All macs I have seen since mavericks use swap if they are used for a while.
  6. Freyqq macrumors 601

    Dec 13, 2004
    True, I was just simplifying it a little. The memory pressure graph is suppose to be the best way to see if you need more ram in 10.10.

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