10Users get intermittent 504s but every backend service metric looks normal. Where is the problem?▼hard★ EssentialNewCloudflareUberShopify2 repliesunlockedThe classic gap between what the backend measures and what the user experiences. A 504 is emitted by something in front of the backend, which is exactly the part your service dashboards do not cover.Open full answer →
20Checkout calls five downstream services. Design backpressure so overload degrades instead of collapsing.▼hardNewNetflixDatadogUber○ sign inEvery overloaded system dies the same way: queues turn load into latency, latency into timeouts, timeouts into retry storms. Tiered shedding, deadline propagation, and retry budgets are the design.Open full answer →
