Mountain Lion and iStat... have a look at Page ins... :)

Discussion in 'MacBook Pro' started by AlexMaximus, Jul 26, 2012.

  1. AlexMaximus macrumors 6502a


    Aug 15, 2006
    A400M Base
    Hi folks,

    I was wondering if Mountain Lion may give a Performance boost to older Macbook Pros.

    I have noticed that the memory controller has changed big time in allocating memory to running programs. Before the upgrade to ML, iStat showed only minor "Page Ins" compared to now with about 2,3 million !!

    This is big time change! Please check yours in iStat, especially if you have 8Gigs of Ram and have monitored Page Ins with Lion before. I bet you will notice a change.
    I think ML has a better memory allocation. Also most of my 8Gigs of Ram is in use now. This was significant different in Lion!

    Please check yourself, I would be thrilled to hear your observation.

    Thanks folks!
  2. ivoruest macrumors 6502


    Jul 12, 2010
  3. mdapple macrumors regular

    Jun 29, 2012
    he said "page IN's". people dont read anymore hah
  4. GGJstudios macrumors Westmere


    May 16, 2008
    I think the point ivoruest is making is that page ins don't matter and aren't worth watching, as you will always have page ins and they'll vary depending on what you're doing. Page outs, on the other hand, indicate that you're maxing out your RAM, so they are worth watching.
  5. Rocky244 macrumors regular

    Jun 14, 2012
    Yea, a quick search/read on google would be informative enough to know how ram works, and to know not to watch the page ins, but instead to monitor free ram, page outs, and swaps.
  6. theSeb macrumors 604


    Aug 10, 2010
    Poole, England
    I think most people completely missed the point the op was making.
  7. The "Dude" macrumors regular

    Sep 29, 2011
    Yeah, I'm afraid people missed the point of the post.

    I'm at 57k page ins @ 5hr uptime.

    I'd love to test ML....BUT I HAVEN'T RECEIVED MY G****MN CODE YET!!!
  8. MTShipp macrumors 6502a

    Mar 25, 2009
    Raleigh, North Carolina
    I uderstand that premise of this and have read it too. However it may not always be the case. Could bad programming do it too? I ask because my rMBP with 16GB of RAM occasionally shows a few Page Outs, albeit very little, without a lot of apps running.


    To reply to the OP, I have 295k Page Ins after 5 hrs uptime.
  9. GGJstudios macrumors Westmere


    May 16, 2008
    Remember that page outs are cumulative since the last restart. They are not real-time. So when you see page outs, you don't know when they occurred, unless you're watching Activity Monitor at the time they appear. It's most likely they occurred at a time you were running more apps or more memory-intensive apps.
    Page ins aren't driven by uptime. They're driven by what apps and documents you open and run. You could have high page ins after 4 minutes of uptime or low page ins after 4 days of uptime. It depends on what you're running.

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