DynamoDB - Access Patterns and Query Optimization
After adding shard IDs to your partition keys for write sharding, some partitions still experience throttling. What is the most probable reason?
After adding shard IDs to your partition keys for write sharding, some partitions still experience throttling. What is the most probable reason?
medium📝 Debug Q6 of 15
Step-by-Step Solution
Solution:
Step 1: Understand shard ID impact
If shard ID range is small, writes concentrate on few shards.Step 2: Effect on throttling
Uneven distribution leads to hot partitions and throttling despite sharding.Final Answer:
Shard ID range is too small, causing uneven write distribution -> Option DQuick Check:
Insufficient shards cause hot partitions [OK]
Quick Trick: Too few shards cause uneven load [OK]
Common Mistakes:
MISTAKES- Confusing read throttling with write throttling
- Thinking sort key affects write distribution
- Assuming indexes affect write throttling
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