Monitoring AWS infrastructure using CloudWatch is mostly  a case of just enabling it for the resources you want monitored. You get automatically selected metrics available in CloudWatch, ready for your dashboard. For some reason though, for EC2 instances you do not get any memory (or disk) metrics. I guess this is a shortcoming Amazon have been asked about a lot, because they have made scripts available that you can run on the instance that will send memory and disk data to CloudWatch. (more…)