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Old 09-18-2013, 10:53 AM   #1
casperdaghost
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measuring performance gain on procees


I installed openbox window manager on my Ubuntu 12.4 LTS virtual machine.
Everybody talks about how much memory it saves.
My question is - how do I calculalte how much memory it saves. What do i look for on a before and after - how do I track how much memory it saves. How do i track performance gain?
 
Old 09-18-2013, 11:06 AM   #2
suicidaleggroll
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Run "top" or "free" to check idle memory usage, and compare it.

Memory savings rarely translate into a "performance gain" or speed improvement, unless of course you run out of memory and have to start digging into swap.
 
Old 09-19-2013, 02:15 AM   #3
zeebra
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Quote:
Originally Posted by suicidaleggroll View Post
Run "top" or "free" to check idle memory usage, and compare it.

Memory savings rarely translate into a "performance gain" or speed improvement, unless of course you run out of memory and have to start digging into swap.
If you want to run a cheap system that takes less power, then there are significant "performance gains" to be made from lowering the memory footprint.

Quote:
Originally Posted by casperdaghost View Post
I installed openbox window manager on my Ubuntu 12.4 LTS virtual machine.
Everybody talks about how much memory it saves.
My question is - how do I calculalte how much memory it saves. What do i look for on a before and after - how do I track how much memory it saves. How do i track performance gain?
Use "top" as suicidaleggroll suggested to check the memory usage.

Furthermore, this article has some interesting comparisons.
http://l3net.wordpress.com/2013/03/1...inux-desktops/

Last edited by zeebra; 09-19-2013 at 02:17 AM.
 
Old 09-19-2013, 05:47 AM   #4
cascade9
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Quote:
Originally Posted by zeebra View Post
If you want to run a cheap system that takes less power, then there are significant "performance gains" to be made from lowering the memory footprint.
If you want to run ancient machines with small amounts of RAM, yeah.

For newer machines, which tend to be more energy efficient than older systems, using a minimal system with a lower memory use desktop wont help that much.

If you've got 2GB+, the difference between the memory consumption of KDE 4.X/Gnome 3/Unity and really light desktops doesnt matter much, if at all.
 
  


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