Kubuntu uses too much memory. What is the cause?

[Chris Jones]

Arnaud bourree wrote:
> Here it is a nice page which explain why Linux looks to take too much ram
> After you will enjoy it ;-)
> 
> http://softwaretracker.blogspot.com/2007/08/understand-why-linux-uses-up-all-memory.html

That article is discussing a different thing. It is talking about file 
caching in free memory.

I am talking about the difference between resident and virtual memory 
size. Resident is what the application is *actually* using at any given 
moment in time. Virtual is kind of the maximum the application could use 
if it where to suddenly use all the ram it could (or has told the kernel 
it could). Its actually more complicated that, more than I could 
describe (or know). Try googling for something like "virtual ram top" e.g.

http://virtualthreads.blogspot.com/2006/02/understanding-memory-usage-on-linux.html

Chris

> 
> Arnaud
> 
> 2009/5/30 Chris Jones <christopher.rob.jones at cern.ch>:
>>> 2 GB for my home machine and 4 GB for my work machine. The few
>>> applications
>>> that use most memory are Kontact and Amarok. Amarok uses +1GB.
>>> Kontact uses
>>> about 700 MB. (One day, I will switch to mutt...).
>> When you look at the memory usage in top, and you quoting the virtual
>> or resident size ? If the virtual then basically ignore that,
>> applications always over commit and it doesn't mean much. The resident
>> size is the important one. I would be very surprised if amarok was
>> really using 1G (i.e. resident)  ??
>>
>> Chris
>>
>>
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>