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Why might a DynamoDB table in provisioned mode experience throttling even if the provisioned capacity units seem sufficient?

hard📝 Conceptual Q10 of 15
AWS - DynamoDB
Why might a DynamoDB table in provisioned mode experience throttling even if the provisioned capacity units seem sufficient?
ATraffic is unevenly distributed causing hot partitions
BOn-demand mode is enabled causing conflicts
CProvisioned units automatically decrease over time
DTable is in a different AWS region than the application
Step-by-Step Solution
Solution:

  1. Step 1: Understand throttling causes beyond capacity units

    Provisioned capacity is per partition; uneven traffic can overload some partitions.

  2. Step 2: Identify hot partition effect

    Hot partitions cause throttling even if total capacity units are enough overall.

  3. Final Answer:

    Traffic is unevenly distributed causing hot partitions -> Option A

  4. Quick Check:

    Hot partitions cause throttling despite sufficient units [OK]
Quick Trick: Uneven traffic causes hot partitions and throttling [OK]
Common Mistakes:
MISTAKES
  • Blaming on-demand mode
  • Thinking provisioned units decrease automatically
  • Assuming region mismatch causes throttling

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