Question about Typical Memory Usage

Discussion in 'MacBook Pro' started by bigdb11, Apr 20, 2009.

  1. bigdb11 macrumors regular

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    #1
    My iStat menus say that I have 466mb wired, 560mb active, 142mb inactive, and 2.59gb Free. Is this normal with firefox and ichat open? I feel like that is kind of a lot to be in use for doing so little.
     
  2. bigdb11 thread starter macrumors regular

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    #3
  3. gr8tfly macrumors 603

    gr8tfly

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    #4
    At the moment, the instance of Safari 4 I have running has a RSIZE of 255MB.

    I don't think you have anything abnormal going on.

    Here's a bit more info on RSIZE & VSIZE (the article is referring to "top", but the definitions are the same for Activity Monitor): Mac OS X: How to View Memory Usage With the "top" Utility
     
  4. bigdb11 thread starter macrumors regular

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    #5
    So, OS X uses up a lot of RAM on its own?
     
  5. CanadaRAM macrumors G5

    CanadaRAM

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    #6
    Yes: Basically, don't worry about it, let OSX manage its own memory.

    There's only one thing you should montior, and that is the PageOut/PageIn ratio. The absolute numbers don't mean much but if the ratio of Outs to Ins gets above 5%, keep an eye on it. If it goes above 10 - 15%, that means you are regularly exceeding the amount of physical RAM you have , and the machine is being slowed down by frequent writes to the hard drive to accommodate the overflowed RAM. At that point consider installing more memory.
     

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