DynamoDB - Access Patterns and Query Optimization
You notice your DynamoDB table has uneven partition key distribution causing slow queries. Which change will fix this?
You notice your DynamoDB table has uneven partition key distribution causing slow queries. Which change will fix this?
medium📝 Debug Q14 of 15
Step-by-Step Solution
Solution:
Step 1: Identify cause of uneven distribution
Uneven distribution happens when partition key has few unique values.Step 2: Choose a partition key with high uniqueness
Changing to a key with many unique values spreads data evenly across partitions, improving performance.Final Answer:
Change partition key to a field with many unique values -> Option AQuick Check:
High uniqueness partition key = even distribution [OK]
Quick Trick: Pick partition key with many unique values to fix distribution [OK]
Common Mistakes:
MISTAKES- Only increasing capacity without fixing key
- Adding sort key with same values doesn't help
- Recreating table without changing key
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