COST 3. Have you selected the appropriate resources to meet your cost targets?
Ensure that the Amazon EC2 instances you select are appropriate to the task at hand. AWS encourages the use of benchmarking assessments to ensure that the instance type you chose is optimized for its workload.
Best practices:
 Match instance profile based on need For example, match based on workload and instance description –compute, memory, or storage intensive.
 Third-party products For example, use third-party products such as CopperEgg or New Relic to determine appropriate instance types.
 Amazon CloudWatch Use CloudWatch to determine processor load.

 Custom Metrics Load custom memory scripts and inspect memory usage using CloudWatch.
 Profiled Applications Profile your applications so you know when to use which type of Amazon EBS (magnetic, general purpose (SSD), provisioned IOPS). Use EBS-Optimized instances only when necessary.