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10.6: Completely Disable Virtual Memory in Snow Leopard
Authored by: sfgecko on Jun 11, '11 11:21:16AM

i tried this hint on a 2006 macbook pro with 3GB RAM (4GB installed, but only 3GB addressable on this model) with 10.6.7 and 5400rpm hdd. i applied the terminal command and rebooted. then i loaded a bunch of apps to use up all available RAM.

here's a screenshot of activity monitor:
http://i.imgur.com/pf2nu.jpg

i noticed everytime it got to 2.99GB used, i was still able to open apps. however, the hard drive was doing some major read/writing (i assume to compensate for the lack of RAM).

although it never kernel panicked and i don't recall it beachballing, the system did become unresponsive because the hard drive was super busy. while swap files were not created in /var/vm, there is some furious hard drive activity when you go beyond the physical ram allotment. i'd be curious to hear an explanation if anyone knows what is happening.

in conclusion, i think this hint is useful and i will continue to use it. will report back if i notice any irregularities with system performance.

Edited on Jun 11, '11 11:29:56AM by sfgecko



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