title: Create cloud watch for monitoring EC2 RAM
body: <p>I always wonder why amazon has not provided cloud watch to monitor EC2 RAM , if they are able to do it for CPU? I understand that Amazon does not have visibility into the guest O/s, whatever is visible to hypervisor, only that could be monitored. Isn't CPU utilization also a part of guest O/S which is invisible to xen hypervisor? Then why is it that only RAM monitoring is excluded?
  I think my understanding isn't clear here, could someone help?</p>