Carry out the following steps to collect this missing data:
- Navigate to the Cloud Manager Administration tab
- Click "Create Instance Credential"
- Once this is created for the instance(s), click "Assign AWS Instances Credentials".
- Once this has been configured, memory and disk metrics should be collected (note this may require an agent restart).
It is a requirement that this is carried out for all Linux based EC2 instances in order to collect/view memory and disk metrics.