3 GB ram

Discussion in 'Buying Tips and Advice' started by skd, Jul 24, 2008.

  1. skd macrumors 6502

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    carmel, ca
    #1
    I have a 17" MBP with 2GB ram. I use it for CAD and 3D modeling. Will i notice much of a speed bump going from 2GB ram to 3GB of ram. Thanks
     
  2. edesignuk Moderator emeritus

    edesignuk

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    #2
    Don't know. Do you use your 2GB? How many page outs do you have? (Activity Monitor will tell you)
     
  3. skd thread starter macrumors 6502

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    #3
    there is a slow down in large files, especially 3D files.....
     
  4. edesignuk Moderator emeritus

    edesignuk

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  5. skd thread starter macrumors 6502

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    #5
    pages out? I don't see that on the Activity Monitor....
     
  6. edesignuk Moderator emeritus

    edesignuk

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    #6
    Open Activity Monitor, click the Memory tab at the bottom, and see what it says for page outs.
     
  7. skd thread starter macrumors 6502

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    #7
    136.00 GB.....
    does this need to be check while working on a large file?
     
  8. edesignuk Moderator emeritus

    edesignuk

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    #8
    Bloody hell, that's a LOT. Yes, max the RAM out.

    When was the last time you rebooted btw?
     
  9. skd thread starter macrumors 6502

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  10. edesignuk Moderator emeritus

    edesignuk

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    #10
    Oh, well that's next to nothing.

    Reboot, use your machine as you would normally for a day. Then see what the figure is.
     
  11. skd thread starter macrumors 6502

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    #11
    after restart - o bytes

    is there a % of free space that should be maintained until you should consider increasing the ram? thnx
     
  12. edesignuk Moderator emeritus

    edesignuk

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    #12
    After reboot it will be 0, that's why you should then use it for a day and see what it gets up to.

    Basically page outs are bad for performance, it means that data that was needed in memory there wasn't enough space for, so it was put out to a page file on your hard disk. When this data was needed again it had to be read from the disk back in to RAM and then other data written out to disk. All of this causes a slow down.
     
  13. 88888888 macrumors 6502a

    Joined:
    May 28, 2008
    #13
    what does page out mean..?
    my vm size is 46.84 gb
    page ins is 757.77 mb
    page outs is 739.77 mb
    swap used: 1.62.

    what do those numbers mean? :confused:
     
  14. skd thread starter macrumors 6502

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    #14
    thanks......I'm an older person and when I was in college we had punch cards to run a computer program. Is there a a size of pages out that will trigger the need for more ram?
     
  15. edesignuk Moderator emeritus

    edesignuk

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    #15
    There might be a "recommended" limit, have a google around, I'm not sure. The higher the figure the more your computer is having to use hard disk instead of RAM, the more it has to do the the worse performance is.
     
  16. deltaiscain macrumors regular

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    Jul 24, 2008
    #16
    Max it out. It is always better to max out the ram, especially why you are dealing with 3d applications
     
  17. jacobsm macrumors newbie

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    Jul 24, 2008
    #17
    Page outs don't matter

    I have been working in a virtual storage environment for almost 30 years and can state that page outs do not have much of an effect on performance, page in's however is where the pain is.

    The operating system handles page outs in an asynchronous manor but when an application requires a page that has been moved out of physical memory it has to wait until the page can be read from the hard disk and back into memory.
     
  18. CanadaRAM macrumors G5

    CanadaRAM

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    On the Left Coast - Victoria BC Canada
    #18
    It's not the total of the PageIns that matter, its the ratio of PageIns to PageOuts. You're looking for 10% or less, 5% or less would be ideal.

    88888888 (can I call you 88 for short?) - you are seeing a 1:1 ratio, so you are an excellent candidate to increase your RAM. Your machine is having to swap memory on and off the hard drive pretty much continuously.

    skd Testing it for just a day isn't really useful, you need a bigger sample size. (Kind of like saying - "My car hasn't needed any gas today, so it must be able to go forever between fill ups".)

    You want to see what your ratio is like after spending some time doing all the things you normally do, including some of your heaviest multitasking / biggest programs.
     
  19. Muncher macrumors 65816

    Muncher

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    #19
    This is an interesting thread for anyone considering upgrading their ram. Candidate for a sticky?
     
  20. 88888888 macrumors 6502a

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    May 28, 2008
    #20
    CanadaRAM: lol yea. I'll look into upgrading my ram this holiday season or when i have enough $$:rolleyes:
     

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