Q: Lion - Memory Usage Problems
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Jul 16, 2012 4:55 PMby William Kucharski,It's not "more effective."
All purge does is empty the system caches, forcing the system ro reload everything it might want from disk.
That makes "memory used" stats look really good, but it's of dubious value to a running system except is certain special circumstances.
It's exactly like dragging your "Applications" folder to the Trash, selecting "Empty Trash" then noticing, gee, you've got a lot of free disk space.
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Jul 23, 2012 6:49 AMby Bobdc6,A logical extension to your question would be that if Apple fixed the problem in Mountain Lion, will they also fix it in Lion, an OS that a lot of us are stuck with due to hardware limitations. Bill Gates is smiling (I bet that he has an Apple computer to play with!).
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Jul 23, 2012 8:20 AMby nkko,People are complaining that they had the same problem before the Lyon, during the time of Snow Leopard, even earlier. It's not fair to buy a Mountain Lion and does not know in advance if this issue is resolved or not. Sometimes I am feeling like I'm wasting money in casino.
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Jul 24, 2012 12:36 AMby makfor,my problem solved after i DELETE all my Wallpaper images !!! i think that the problem was when the OS load big images , not too big but i think that happen when the image was over 1MB or maybe 2MB , my biggest image was 8MB !!! i delete all big images and i leave only images up to 1MB and now i dont have a problem
i use 3 virtual desktops !!!
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Jul 26, 2012 7:53 AMby ilias_l,I wrote this script to be run every 10 minutes via a crontab job and it solved my problems. It runs purge when free memory gets below 250MB. I get the free memory by parsing the "top" command line output.
Hope it helps.
Ilias
#!/bin/bash MM=`top -l 1 -n 0 | awk '/PhysMem/ {print $10}' |sed s/M//g` echo "Free Memory:" $MM if [ "$MM" -le "250" ]; then echo "Free memory is running low: " $MM"MB. Releasing now..." purge exit 0 else echo "Memory ammount" $MM"MB does not meet purge threshold." exit 0 fiTo make it run every 10 minutes type in console
crontab -e
And then in the configuration file add (replace the path to the path where you saved the script (it has to be exectuable):
*/10 * * * * /Users/xxx/pathToYourScript
