On Fri, 21 Mar 2003, Ninad Purohit wrote:
often i see that my memory 256(preciously little) Mb is 100% utilized
that's a good thing. think about it this way. if you had 256MB, and only 128MB was used, that means that you bought 128MB RAM extra which you are not using. Linux will expand to use all RAM available. It will allocate any free RAM to cache and buffers so that programs open faster and have faster access to data. If more RAM is required by running programs, the system will reallocate from the cache and buffers.
Swap space will be used only if the total RAM required by programs (not cache and buffers) exceeds your available RAM.
Check the output of free.