Originally Posted by sir_han
Thanks for the reply. It seems that my physical memory is 95% used. I don't think that's a good sign though.
No, the memory used will usually show almost up to the value of the physical memory in there - as mentioned before, linux will use this amount of memory.
You have problems if your Loads are high, if your IOWaits are highly utilised and if the Swap used is increased and getting high - thats when you start to worry.
Your system looks, on the surface to be fine. If you want to get it confirmed have a sysadmin look over it for you.