Wired Memory in Lion

Discussion in 'Mac OS X Lion (10.7)' started by Chippy99, May 13, 2012.

  1. macrumors 6502a

    Apr 28, 2012
    Recently I put 16GB of ram in my Mac Mini. To be honest it's not because I need 16GB, more because I could and well, I just fancied trying it.

    Now I notice Lion is using 1.35GB!!! of wired memory. This is from cold boot, with nothing other than Safari and Activity Monitor loaded.

    Is this normal? It seems a hell of a lot. Kernel_task is using 635MB (don't know if that comes under "wired"?) but even allowing for that I can't see how 1.35GB is being used up.

    Is there any way to check what is using the wired memory - and whether or not it should be?

    I have noticed the occasional disk thrashing and page out when doing Carbon Copy backups, which with 16GB of ram seems utterly ridiculous. I don't have any notoriously memory-heavy apps like Parallels or VMWare. Just normal stuff.

    Any ideas?
  2. mulo, May 13, 2012
    Last edited: May 13, 2012

    macrumors 68020


    Aug 22, 2010
    Behind you
    wired memory is required by hardware, this will be desecrate graphics memory, thunderbolt controller etc.
    and yes its perfectly normal. I'm running with 1.9GB wired right now on my MBP - see signature

    Do note that the more memory you have in your machine, the more memory it will wire to your discrete graphics card etc to increase its performance.

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