Episode 127 of Cloud Computing with Fexingo dives into a hidden cost in cloud databases: read replicas. Lucas and Luna break down why AWS, Azure, and GCP charge for replica compute, storage, and data transfer—often doubling or tripling costs for read-heavy workloads. They examine a real-world case: a SaaS company that ran 15 read replicas on Aurora PostgreSQL and saw its monthly bill hit $47,000, mostly from cross-AZ data transfer between primary and replicas. The episode covers replication lag, auto-scaling pitfalls, and why some teams accidentally leave stale replicas running. Listeners learn one actionable takeaway: how to audit replica usage with simple monitoring queries and whether a caching layer (like ElastiCache) might be cheaper than throwing replicas at read scaling.

#CloudComputing #AWS #Azure #GCP #ReadReplicas #DatabaseCosts #AuroraPostgreSQL #Technology #CloudBills #DataTransfer #ReplicationLag #SaaS #Caching #ElastiCache #FinOps #CloudOptimization #FexingoBusiness #BusinessPodcast

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