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How to Optimize Costs in Amazon RDS; Part 2

In the current scenario, the ability to control expenses without compromising the performance of mission-critical applications is one of the largest difficulties faced by any IT team. Users using RDS pay only for the services they actually use, that is the resources, just like any other AWS tool. As a result, it is important to regularly review the design to ensure that the resources are operating at their best and that we are getting the most out of our spending. In this blog, we have continued the key steps of How to optimize costs in Amazon RDS; Part 1. Let’s get started with it.

Key steps for the cost optimization in AWS RDS; Part 2

Setting up the Amazon RDS resource’s use guidelines

Stakeholders create policies to identify underutilized RDS instances in this stage, as well as the procedures to follow after they have been located. These guidelines address three essential Amazon RDS facets:

  • Explore replicas
  • Non-utilized occurrences
  • First-instances

For each policy, suggestions are given in the following sections.

A. View the replica policy

Improved scalability and durability are offered by Amazon RDS read replicas for RDS DB instances. The capacity to scale read traffic horizontally is offered by these read replicas. In particular, read-intensive database workloads benefit from this.

B. Policy on Non -utilized occurrences

RDS instances that are not used increase total costs without adding any benefit. It is advised that any unnecessary instances be identified and terminated in accordance with the company policy. In non-production settings, instances are occasionally set up for fast testing and are never taken down after the task is over. These underused instances continue to cost money since they are not utilized.

C. First-instances principle

Read and write traffic for your application is handled by the main RDS instance. Consequently, it must be properly scaled to satisfy the needs of your application. On the other hand, you don’t want to keep it unused. Look for primary instances with steady CPU consumption, less than 30% and I/O less than 30% to spot underutilized primary instances.

Understanding and improving policies and processes

Following the implementation of this procedure, it is critical to continue monitoring and identifying areas for improvement. This ensures that rules and processes are always evolving to meet your workloads and organizational demands. During this stage, you may want to think about building automation to auto-scale and right-size the instances in your fleet as your workload changes. Changing the instance type causes downtime, thus it’s critical to prepare ahead of time so that it has no or little impact on your workload.


Cost optimization is a continuous process, which is crucial. Instead, it is an ongoing process, and the sooner we implement it, the more effective our databases will be. If you still have any confusion or queries related to Amazon RDS, feel free to contact our team of experts at Princeton IT services.