The DynamoDB Partition Split That Doubled Our P99 Latency

📰 Medium · DevOps

Learn how a DynamoDB partition split unexpectedly doubled P99 latency and how to investigate such issues

intermediate Published 7 Jun 2026
Action Steps
  1. Investigate DynamoDB partition splits using CloudWatch metrics
  2. Analyze P99 latency trends to identify potential issues
  3. Use AWS X-Ray to trace requests and identify performance bottlenecks
  4. Configure alarms for unusual partition split events
  5. Test and validate changes to ensure improved performance
Who Needs to Know This

DevOps and cloud engineering teams can benefit from understanding how to identify and troubleshoot invisible infrastructure events like DynamoDB partition splits

Key Insight

💡 Regularly monitoring and investigating invisible infrastructure events like DynamoDB partition splits is crucial to maintaining optimal application performance

Share This
💡 DynamoDB partition splits can silently kill your app's performance. Learn how to catch and fix them

Key Takeaways

Learn how a DynamoDB partition split unexpectedly doubled P99 latency and how to investigate such issues

Full Article

A production investigation into the invisible infrastructure event that no CloudWatch alarm catches. Continue reading on Medium »
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