Demystifying Amazon DynamoDB on-demand capacity mode

This article demystifies common misconceptions about Amazon DynamoDB's on-demand capacity mode, providing insights into its cost, performance, and operational characteristics.

• Cost myths debunked:
  • On-demand mode can be cost-effective when considering total operational expenses
  • You only pay for actual read and write requests
  • No charges for unused capacity
• Performance insights:
• Maintains consistent single-digit millisecond latency
• Scalable beyond initial 40,000 capacity units with quota increases
• Can handle sudden traffic spikes with proper planning
• Operational benefits:
• Can set maximum throughput limits
• No downtime when switching capacity modes
• Reduces operational overhead for capacity management

The article recommends evaluating DynamoDB capacity modes based on specific workload characteristics and operational requirements.