Memory problems (was Re: CPU and Memory usage of XFree86)

[Nirmal Govind <nirmalg@psu.edu>]

Another related qn.. the memory usage statistic using top doesn't show 
memory freeing up after I close some heavy duty programs like Openoffice 
and mozilla that I had running.. so in effect, the memory usage grows 
till almost 100% of the memory is used up but it never comes back down.. 
so I shut down X and checked top again, a little bit was freed up but 
almost 80% of my 640MB RAM was used up though all I had running was a 
console login... I had to reboot to get the memory freed up... any idea 
why this happens? Any solution? I'm using KDE 3.1 and a ben10 kernel on 
an ibook 2.2 ...

Thanks,
nirmal