Ram use

[Jensen Somers]

On Sun, Jun 21, 2009 at 01:04, Karl F. Larsen<klarsen1 at gmail.com> wrote:
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> Rashkae wrote:
>> Steve Reilly wrote:
>>> Karl Larsen wrote:
>>>>     I was curious to determine if Kubuntu uses more RAM than Gnome.
>>>> Since I have both on my laptop in version 8.10 I decided to try to
>>>> measure this. I used top to get the data and I saved the part needed to
>>>> gedit which you can get on both kubuntu and gnome. I took data at 10
>>>> minutes after boot-up. Here is the data:
>>>>
>>>>
>>>> This what kumbutu has at 10 minutes after a boot-up
>>>>
>>>> top - 15:41:02 up 10 min,  2 users,  load average: 0.11, 0.20, 0.16
>>>> Tasks: 111 total,   3 running, 108 sleeping,   0 stopped,   0 zombie
>>>> Cpu(s):  2.0%us,  1.0%sy,  0.0%ni, 96.0%id,  0.0%wa,  0.3%hi,  0.7%si,
>>>> 0.0%st
>>>> Mem:   2003384k total,   703040k used,  1300344k free,    18636k buffers
>>>> Swap:  4096564k total,        0k used,  4096564k free,   265856k cached
>>>>
>>>>
>>>> This is what Gnome has at 10 minutes after boot-up
>>>>
>>>> top - 15:54:00 up 10 min,  2 users,  load average: 0.00, 0.12, 0.12
>>>> Tasks: 113 total,   1 running, 112 sleeping,   0 stopped,   0 zombie
>>>> Cpu(s):  1.0%us,  0.0%sy,  0.0%ni, 99.0%id,  0.0%wa,  0.0%hi,  0.0%si,
>>>> 0.0%st
>>>> Mem:   2003384k total,   476996k used,  1526388k free,    16508k buffers
>>>> Swap:  4096564k total,        0k used,  4096564k free,   185312k cached
>>>>
>>>>
>>>>     Notice that it is 703040k and 476996k which shows that Gnome uses
>>>> 226044k less Ram.
>>>>
>>>> This is nearly half again as much as Gnome and .226Gb can be a lot if
>>>> you have just 1 GB of RAM.
>>>>
>>>>
>>>> 73 Karl
>>>>
>>>>
>>
>> While it's been my experience that KDE is memory hungry as well, Karl
>> neglected to subtract cache and buffers from his memory usage.  When you
>> do, the difference is 143MB.  And without knowing more about what
>> services are running on each system, and how much memory will get shared
>> with other apps, that kind of difference is really not much from which
>> to draw any kind of conclusion.
>>
>        Not correct. The cache and buffers are NOT in my results. My results
> are accurate.
>
>
> 73 Karl

Yes they are and no they are not. Get your facts right for once
please. KDE's memory management is different from Gnome which messes
up the results obtained by top or ps.

Please read http://virtualthreads.blogspot.com/2006/02/understanding-memory-usage-on-linux.html
and http://www.kdedevelopers.org/node/1445 for a decent explanation on
how this actually works.

>
>
> - --
>
>        Karl F. Larsen, AKA K5DI
>        Linux User
>        #450462   http://counter.li.org.
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- Jensen