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  1. #1
    How does OS X allocate ram to applications?

    Member Since
    Aug 28, 2004
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    How does OS X allocate ram to applications?
    Hey everyone, have a question. On XP I notice that a lot of the time, most applications use little ram. If I have 1gb, a tiny program may be 1mb, Word may use 15 and so on. However, on my PowerBook, it seems like applications use tons of ram. Widgets seem to be around 25mb each as well. It seems as though the Mac takes all of your available ram, and allocates it to all running applications, is that correct? I've only been using 1 or 2 widgets because I'm paranoid I'm losing 100mb of ram to them! Thanks for the help!

  2. #2
    supremeoverlord
    Guest
    most of the RAM that OSX uses is virtual ram, that is hard disk space. Whatever program your are using at the time takes as much real ram as it needs and everthing else makes due with virtual ram, this is why laptops might not be as speedy as slower desktops because of the faster drive it can write virtual ram faster allowing for quicker transitions from real to virtual ram. Very few programs hold onto more ram than they need so don't worry about it. its fine.

  3. #3
    How does OS X allocate ram to applications?
    deus_ex_machina's Avatar
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    Aug 06, 2004
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    2GHz Mac Mini 2GB RAM 160GB 10.6.2 | MDD DP 1.25GHz G4 1.5GB RAM 10.4.11 | 233MHz iMac G3 10.3.9
    To the best of my knowledge (someone correct me if wrong) Mac utilize more RAM than PC in cache to avoid diving into the hard drive all the time. I notice on the PC at work its constantly revving and accessing the drive while my Mac at home only revs when I access a large file.

  4. #4
    How does OS X allocate ram to applications?
    IronMac's Avatar
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    Mini C2D 2Ghz 8GB RAM, MB C2D 2.2Ghz, MBP CD 2Ghz, 1TB TC, 2 APX, iPhone 4, ATV2, 23in ACD x2
    Quote Originally Posted by leemoreau
    Hey everyone, have a question. On XP I notice that a lot of the time, most applications use little ram. If I have 1gb, a tiny program may be 1mb, Word may use 15 and so on. However, on my PowerBook, it seems like applications use tons of ram. Widgets seem to be around 25mb each as well. It seems as though the Mac takes all of your available ram, and allocates it to all running applications, is that correct? I've only been using 1 or 2 widgets because I'm paranoid I'm losing 100mb of ram to them! Thanks for the help!
    Check this out
    http://docs.info.apple.com/article.html?artnum=107918

  5. #5
    How does OS X allocate ram to applications?
    IronMac's Avatar
    Member Since
    Dec 08, 2004
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    Mini C2D 2Ghz 8GB RAM, MB C2D 2.2Ghz, MBP CD 2Ghz, 1TB TC, 2 APX, iPhone 4, ATV2, 23in ACD x2
    Quote Originally Posted by leemoreau
    Hey everyone, have a question. On XP I notice that a lot of the time, most applications use little ram. If I have 1gb, a tiny program may be 1mb, Word may use 15 and so on. However, on my PowerBook, it seems like applications use tons of ram. Widgets seem to be around 25mb each as well. It seems as though the Mac takes all of your available ram, and allocates it to all running applications, is that correct? I've only been using 1 or 2 widgets because I'm paranoid I'm losing 100mb of ram to them! Thanks for the help!
    Check this out
    http://docs.info.apple.com/article.html?artnum=107918

    Hey Deus I grew up in SA used to love going to Enchanted Rock

  6. #6
    How does OS X allocate ram to applications?

    Member Since
    Mar 30, 2004
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    USA
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    12" Apple PowerBook G4 (1.5GHz)

  7. #7
    How does OS X allocate ram to applications?

    Member Since
    Jun 02, 2005
    Posts
    111
    Quote Originally Posted by IronMac
    Check this out
    http://docs.info.apple.com/article.html?artnum=107918

    Hey Deus I grew up in SA used to love going to Enchanted Rock
    OT: Hamilton's Pools is awesome too.... But that's not really in SA

  8. #8
    How does OS X allocate ram to applications?
    deus_ex_machina's Avatar
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    Aug 06, 2004
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    2GHz Mac Mini 2GB RAM 160GB 10.6.2 | MDD DP 1.25GHz G4 1.5GB RAM 10.4.11 | 233MHz iMac G3 10.3.9
    Quote Originally Posted by IronMac
    Check this out
    http://docs.info.apple.com/article.html?artnum=107918

    Hey Deus I grew up in SA used to love going to Enchanted Rock
    Never been out to Enchanted Rock - heard it's awesome. Should go when I have a free weekend

  9. #9
    How does OS X allocate ram to applications?
    IronMac's Avatar
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    Dec 08, 2004
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    Quote Originally Posted by deus_ex_machina
    Never been out to Enchanted Rock - heard it's awesome. Should go when I have a free weekend
    Yeah I miss it down there.

  10. #10
    How does OS X allocate ram to applications?
    IronMac's Avatar
    Member Since
    Dec 08, 2004
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    Specs:
    Mini C2D 2Ghz 8GB RAM, MB C2D 2.2Ghz, MBP CD 2Ghz, 1TB TC, 2 APX, iPhone 4, ATV2, 23in ACD x2
    Quote Originally Posted by deus_ex_machina
    Never been out to Enchanted Rock - heard it's awesome. Should go when I have a free weekend
    Yeah I miss it down there. So many fresh parks. Pedenales Falls is good too.
    You should check this out. http://www.tpwd.state.tx.us/spdest/f...st/index.phtml

  11. #11
    How does OS X allocate ram to applications?
    deus_ex_machina's Avatar
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    Aug 06, 2004
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    2GHz Mac Mini 2GB RAM 160GB 10.6.2 | MDD DP 1.25GHz G4 1.5GB RAM 10.4.11 | 233MHz iMac G3 10.3.9
    Quote Originally Posted by IronMac
    Yeah I miss it down there. So many fresh parks. Pedenales Falls is good too.
    You should check this out. http://www.tpwd.state.tx.us/spdest/f...st/index.phtml
    Pedernales is great - lately i've been visiting Bastrop/Buescher State Parks and the sites off the Blanco just outside of New Braunfels, when weather permits. Beautiful country out here

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