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10.6: Completely Disable Virtual Memory in Snow Leopard
Authored by: broomburgo on Jun 11, '11 03:28:58AM

I think this trick could work if you are lucky enough.

I did it: yesterday I disabled the virtual memory and checked the memory usage in real time with menumeters during an afternoon of work with xcode in iOS programming.

The wired memory kept to fill up the total memory available (8GB), and I didn't notice any speed bump, but I have an SSD, so I'm not sure, because memory swapping with an SSD could be fast enough to make the system sufficiently snappy on its own.

After some hours (3 or 4) the memory was completely full, and the system didn't crash: it simply stopped to work, I couldn't do anything, no kernel panic but the macbook pro was freezed. Actually I was expecting that (but I love to make experiments), so I shut off the macbook pro pressing the button for two seconds, and then I rebooted. Nothing happened right after that, but this morning OSX did some silly things, like resetting the system date to 2001, and asking for network permissions for all the system level services. Also, mail asked me again for all the account and passwords.

I don't know exactly what happened, but I suggest to NOT disable the virtual memory.



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