sync; echo 3 > /proc/sys/vm/drop_caches

clean up memory on linux (fedora)

It clears caches from memory. It works fine on CentOS and Fedora. It will show you how much memory you need, for real.

-4
By: renich
2011-04-26 21:12:06

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    freeman · 2009-08-01 21:00:43 2
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  • On Fedora clean the boot directory; erase older kernel


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    rpm -q kernel-2* | grep -v $(uname -r) | xargs yum erase -y
    Nick · 2009-03-28 21:41:15 1
  • When you run a memory intensive application (VirtualBox, large java application, etc) swap area is used as soon as memory becomes insufficient. After you close the program, the data in swap is not put back on memory and that decreases the responsiveness. Swapoff disables the swap area and forces system to put swap data be placed in memory. Since running without a swap area might be detrimental, swapon should be used to activate swap again. Both swapoff and swapon require root privileges.


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    alperyilmaz · 2009-03-25 03:30:41 0
  • probably only works if you have one graphics card. used this: http://www.cyberciti.biz/faq/howto-find-linux-vga-video-card-ram/ as reference can be expanded, for example: lspci -v -s `lspci | awk '/VGA/{print $1}'` | sed -n '/Memory.*, prefetchable/s/.*\[size=\([^]]\+\)\]/\1/p' will just get the amount of prefetchable memory compare to: lshw -C display which does not give the size (it does give byte ranges and you could calculate the size from that, but that's a pain) Also uses a command which is not standard on linux; wheras lspci is a core utility provided by most systems Show Sample Output


    1
    lspci -v -s `lspci | awk '/VGA/{print $1}'`
    infinull · 2010-10-26 17:45:14 0

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