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Local to Production: Scaling Systems

The Database Problem4

Direct database calls, and why they work at first
Slow queries and why indexes matter
Read replicas and splitting reads from writes
Vertical vs horizontal scaling

Scaling the App Layer4

Caching for Speed4

Async Work & Scheduling4

Putting It All Together4

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Local to Production: Scaling Systems

The Database Problem4

Direct database calls, and why they work at first
Slow queries and why indexes matter
Read replicas and splitting reads from writes
Vertical vs horizontal scaling

Scaling the App Layer4

Caching for Speed4

Async Work & Scheduling4

Putting It All Together4

Learn Local to Production: Scaling Systems The Database Problem

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Read replicas and splitting reads from writes

What to do once queries are fast and connections are pooled, but the single database machine still can't keep up with read volume.

10 min readUpdated 2026-09-04databasesscalingreplication