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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?" :)

Mac's OS RAM memory usage / consumption


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Chrisman

 
Member Since: Aug 12, 2007
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I'm a recent switcher and I'm trying to get a good understanding of the Mac's OS RAM memory usage / consumption.

I have a 2007 Aluminum iMac, 2.4 Ghz, 24 inch screen, 500 Gig HDD, 2 Gigs RAM. Looking at the Activity Monitor or iStat, I can see that I have about:

200-230 Megs or Wired memory
500+ Megs of Active memory
500+ Megs of Inactive memory
700+ Megs of free memory

all out of a total of 2 Gigs

These numbers are without any programs running besides the Finder, Quicksilver and a few of the basic Widgets. The computer's been running for over a week without a restart (I put it into sleep mode instead). Is this normal to have this much Active memory? I think I've read that certain programs can take more and more Active memory as the computer goes without a restart but I'm not sure how true that is.

Anyone have any insight on this or know where I can get more info?


24 inch iMac 2.4Ghz (mid 2007), 500 Gig HD, 2Gig Ram
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the8thark

 
Member Since: Jan 27, 2007
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Mac Specs: 17 inch 2 GHz C2D imac (5,1) with 3GB DDR2 RAM, X1600 (128MB memory) GPU - OSX 10.6.3

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I think having that much active memory is totally possible. And yeah some apps do make more and more of it active. But beware for some apps have a memory leak and make this even worse.

I think a quick log off and back on every so often would fix this problem I think and is lex tasing on the machine than a full restart.
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knightlie

 
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It's normal. If you hover the mouse over the labels next to each it'll tell you what they mean. I'm not sure of the difference between Inactive and Free - I think Inactive is memory that has been used in the past and then deallocated, Free is memory that's never been used.

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the8thark

 
Member Since: Jan 27, 2007
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Mac Specs: 17 inch 2 GHz C2D imac (5,1) with 3GB DDR2 RAM, X1600 (128MB memory) GPU - OSX 10.6.3

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I just found this article. It should answer your questions.

http://docs.info.apple.com/article.html?artnum=107918
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Chrisman

 
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Thanks for all the help!


24 inch iMac 2.4Ghz (mid 2007), 500 Gig HD, 2Gig Ram
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