![]() Let's find it by launching the rest of the applications. I can switch to any one of the applications and use it without undue thrashing. While all this is going on, here I am typing away in BBEdit without an apparent slowdown. Wired RAM increased slightly, presumably due to increased kernel resource usage by all the newly launched applications.īut the numbers only tell part of the story. But check out the other highlighted spec: 2648 pageouts. ![]() Mac OS X is apparently determined to keep a small stash of free RAM. The first thing you'll notice is that the amount of free RAM has stayed about the same (a slight increase, actually). MemRegions: num = 2905, resident = 145M + 4.84M private, 33.0M shared SharedLibs: num = 95, resident = 9.61M code, 324K data, 2.00M LinkEdit Let's see how the picture changes: Processes: 46 total, 2 running, 44 sleeping. Now I'll launch the following applications: Sherlock, Mail, OmniWeb, Preview, TextEdit, iCab, Network Utility, and Disk Utility, plus Word and Photoshop in classic. But note that nothing at all has been paged out at this point, and only 25.5M is "wired" (meaning it cannot be paged out: mostly kernel-related memory). Physical memory is nearly exhausted on a 256MB system under what would be a pretty light load in Mac OS 9. MemRegions: num = 1821, resident = 82.6M + 5.48M private, 31.4M shared SharedLibs: num = 81, resident = 16.9M code, 1.20M data, 4.38M LinkEdit Here's a peek at the output of the ( Unix) top command: Processes: 38 total, 4 running, 34 sleeping. As I write this, I'm running the Finder, iTunes, Terminal, System Preferences, and DragThing, plus IE and BBEdit in the classic environment. ![]() Yes, OS X's virtual memory infrastructure is very solid, but you can't get blood from a stone. ![]() Rule number 541 of computer use: never run any software on the "minimum required system" marked on the box. But merely "booting" is a far cry from "using." I'll bet you could even boot OS X with as little as 32MB if you were persistent enough. Some people will tell you that you can get by with 64MB if you don't run classic. The official requirement is a minimum of 128MB of RAM. ![]()
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