early 2009 iMac 4G, memory used 3.7G under Activity Monitor, very slow Chrome

Discussion in 'OS X Mountain Lion (10.8)' started by tanventure, Jan 17, 2013.

  1. macrumors newbie

    Jan 17, 2013
    After upgrading to OSX 10.8, I found my iMac ran very slow especially when many tab, say, 8 -10, opened for Chrome. Other than Chrome, I often need to open Firefox, Adobe, Evernote, then from Activity monitor, often noticed that out of 4G memory Used 3.7G. I wonder if this is considered too high, means I need to install more memory?

    I understand for my iMac, the maximum is 8G, wonder if this will fix my problem in slow Chrome ? What is the right level of Used memory, say, under 80% ?

    Thanks for any help or suggestions
  2. macrumors 603


    More memory is almost always a good idea, and it is not expensive.

    Look how many pageouts you get and post here, or make a screenshot and post here.

    Screenshot = Command-Shift-4 then hit the spacebar and click on the window to make a screenshot.
  3. thread starter macrumors newbie

    Jan 17, 2013
    After a few days of running, the page out can be big, 8G. But if I restarted it, then it comes to 0. I have not tried to see how long it would run to get the page out that big.

    I was not sure what would be the right range for Used Memory. After restarted it, now Page out is 0, but Used Memory: 3.87G, at the moment iMac is not very
    slow though.


  4. thread starter macrumors newbie

    Jan 17, 2013
    Forgot to include the screenshot,

    Attached Files:

  5. justperry, Jan 17, 2013
    Last edited: Jan 17, 2013

    macrumors 603


    It's not slow because you restarted which frees all active memory and swapfiles.
    You said before it was 8 GB, that is big and it shows you need more RAM to get rid of swapfiles.

    8 GB instead of 4 GB will make a difference and you most likely will not run out of physical memory which means no slow downs anymore.

    If you go for more RAM I would suggest crucial, Corsair seems to have quite a bit of problems.

    Edit: When did you restart and how many Apps are open now, or did you open many-many tabs again since after a restart it should not be 3.78 GB.
  6. thread starter macrumors newbie

    Jan 17, 2013
    Yes, I plan to change the memory to 8G, thanks for your suggestion on the memory too. I will see how long it would take to grow the page out no. to 8G. I have never watched the no. carefully.

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