DynamoDB - Access Patterns and Query Optimization
A table uses a composite partition key with 'Region' and 'UserId'. Hot partitions occur in one region. How can you reduce hot partitions?
A table uses a composite partition key with 'Region' and 'UserId'. Hot partitions occur in one region. How can you reduce hot partitions?
hard🚀 Application Q9 of 15
Step-by-Step Solution
Solution:
Step 1: Identify hot region cause
Hot partitions in one region mean many writes target same 'Region' and 'UserId' keys.Step 2: Apply suffix to spread load
Adding random suffix to 'UserId' in that region spreads writes across partitions.Final Answer:
Add a random suffix to 'UserId' within the hot region -> Option AQuick Check:
Random suffix in composite key reduces hot partitions [OK]
Quick Trick: Randomize keys in hot regions to balance load [OK]
Common Mistakes:
MISTAKES- Removing region increases hot partitions
- Increasing capacity doesn't fix key distribution
- Using only region causes more hotspots
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