AWS Certified Solutions Architect Associate SAA-C03 Practice Question

Integrating Amazon ElastiCache in front of the database is the most cost-effective solution. By caching frequently accessed data, ElastiCache reduces the load on the database and improves read performance without the need to scale up the database instance or add read replicas, which can be more costly. While adding read replicas can distribute the read traffic, it involves additional costs for maintaining multiple database instances. Scaling up the database instance increases costs and may not effectively handle high read traffic. Migrating to Amazon DynamoDB requires significant changes to the application and may not be suitable if relational database features are needed.