Upgraded ram 4GB = increase in wired memory?

Discussion in 'MacBook Pro' started by ddoonie, Jul 3, 2008.

  1. ddoonie macrumors regular

    Joined:
    Jun 4, 2008
    #1
    Quick question.

    I have upgraded to 4gb of ram (2.4ghz MBP) today, and noticed my wired memory has jumped from 120 or so to 480mb. I repaired permissions, resent pram, cleared caches etc...

    Is this normal? An increase in total memory, increases wired memory? When adding up processes, i cant see it adding up to 480 in wired memory.

    What are you normal numbers?
     

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  2. CanadaRAM macrumors G5

    CanadaRAM

    Joined:
    Oct 11, 2004
    Location:
    On the Left Coast - Victoria BC Canada
    #2
    Short answer: Don't worry about it, let OSX manage the memory how it likes.

    The only thing you need to watch is the PageOut values, that they stay lower than 10% of the page Ins - ideally less than 5%.

    Your PageOuts are zero, which means you are running at maximum RAM efficiency.
     
  3. ddoonie thread starter macrumors regular

    Joined:
    Jun 4, 2008
    #3
    Just the person i wanted to hear from. Thank you for your help and knowledge on these forums!!
     
  4. ddoonie thread starter macrumors regular

    Joined:
    Jun 4, 2008
    #4
    If anyone else was wondering, another very helpful person provided me this.

    http://developer.apple.com/document...tual/ManagingMemory/Articles/AboutMemory.html

    this is the interesting paragraph

    Wired data structures are also associated with the physical page and map tables used to store virtual-memory mapping information, Both of these entities scale with the amount of available physical memory. Consequently, when you add memory to a system the wired memory increases even if nothing else changes.
     

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