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Horizontal Scaling in Databases: Part 1 - Read Replicas
2025-12-26•7 min read
How read replicas reduce primary database load, improve read throughput, and what consistency tradeoffs to watch in production.
DatabasesScalabilityBackend
Why Read Replicas Matter
Read-heavy products often hit database bottlenecks before app servers. Read replicas split read traffic from writes so the primary can stay healthy.