https://thedavidpage.pages.dev/tags/databases/Recent content in Databases on The David PageHugo -- gohugo.ioenFri, 10 Apr 2026 09:00:00 +0700https://thedavidpage.pages.dev/posts/cloud/aws/dynamodb/dynamodb-on-demand-flash-sale-throttling/Fri, 10 Apr 2026 09:00:00 +0700https://thedavidpage.pages.dev/posts/cloud/aws/dynamodb/dynamodb-on-demand-flash-sale-throttling/<p><strong>On-Demand is marketed as scale-to-anything with zero capacity planning. It isn&rsquo;t quite that — and a flash sale is exactly the kind of event that finds the gap.</strong></p> <p>Hi everyone 👋</p> <p>DynamoDB On-Demand is pitched as the effortless auto-scaling option — no need to pre-calculate WCU/RCU. That word &ldquo;automatic&rdquo; comes with a fine-print condition that matters a lot the first time you hit it.</p> <h2 id="-the-disaster-scenario">😱 The disaster scenario</h2> <p>A system runs smoothly at a steady ~1,000 requests/second. At midnight, a flash sale kicks off, and traffic jumps to ~20,000 requests/second within seconds.</p>