DynamoDB - Access Patterns and Query Optimization
A developer notices that a DynamoDB table has throttling errors on some partitions. Which of the following is the most likely cause related to partition key design?
A developer notices that a DynamoDB table has throttling errors on some partitions. Which of the following is the most likely cause related to partition key design?
medium📝 Debug Q6 of 15
Step-by-Step Solution
Solution:
Step 1: Identify throttling cause
Throttling often occurs when some partitions receive too many requests.Step 2: Link throttling to partition key design
Low cardinality keys cause hot partitions, leading to throttling.Final Answer:
Partition key has low cardinality causing hot partitions. -> Option BQuick Check:
Low cardinality = hot partitions = throttling [OK]
Quick Trick: High cardinality partition keys reduce throttling [OK]
Common Mistakes:
MISTAKES- Blaming UUID keys for throttling
- Ignoring partition key impact on throttling
- Assuming high throughput prevents throttling always
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