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Switcher Hangout The place for switchers to discuss their new machines, and how to work with OS X. General support can be had here for newbie stuff, like "How do I restart my new iMac?" :)

How does OS X allocate ram to applications?


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edokid

 
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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!
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supremeoverlord
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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.
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deus_ex_machina

 
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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.
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IronMac

 
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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
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IronMac

 
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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
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technologist

 
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Quote:
Originally Posted by IronMac
This too:
http://developer.apple.com/documenta...outMemory.html
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Redbrick

 
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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
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deus_ex_machina

 
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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
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IronMac

 
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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.
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IronMac

 
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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. 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
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deus_ex_machina

 
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deus_ex_machina is just really nicedeus_ex_machina is just really nicedeus_ex_machina is just really nicedeus_ex_machina is just really nicedeus_ex_machina is just really nice
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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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