Database Scaling: From Single Instance to Global Distribution

Database scaling is often the biggest bottleneck in growing applications. Understanding the progression of scaling strategies helps you plan ahead without over-engineering.

Start with vertical scaling — bigger machines. Then add read replicas for read-heavy workloads. Connection pooling with PgBouncer reduces connection overhead. When you hit the limits of a single primary, consider horizontal sharding.

Caching layers with Redis dramatically reduce database load. For global applications, consider multi-region deployments with tools like CockroachDB or Vitess.