Ram memory normal usage on N2048 and N4032

I have a doubt regarding the ram usage on N2048 and N4032. The N2048 has a 1GB Ram memory but the usage seems to be pretty high  ( nearly to 1GB). Under standard conditions what is the average usage of this model? 

This is the current code : Dell Networking N2048, 6.2.0.5, Linux 3.6.5-1289​203e 

We want to discard a memory leak on switches running this code.

Thank you.

Luis.