enable resource control notification to notify thorugh AWS SNS Topic or AWS SQS queue management system instead of just email notification.
Having a mechanism to notify systems resources & system memory utilization as well as global handling notification through others means particularly AWS SNS Topic or AWS SQS queue, will help in automating the system and make these notifications acionable.
In case systems CPU utilization breaches certain defined threshold or memory's utilization breaches the defined threshold, then notifying them thorugh email will become redundant as all one can do is view. Where as notifyign it to SNS Topic or SQS queue will not only help automate the process but also will make these notifications actionable and take precautionary measures like scaling the replication server Up/Down to handle more load/requests.