14Pick a trace-sampling strategy for our checkout service and defend it.▼medium★ EssentialNewDatadogStripeLinkedIn○ sign inChoose what evidence must survive, then price the collection path. A tail policy can only inspect traces that reach it; low SDK sampling changes the guarantee before the collector sees a span.Open full answer →
04Your p99 latency is three seconds while the average is two hundred milliseconds. Where do you look?▼hardNewGoogleDatadogStripe2 repliesunlockedA senior favourite, because the naive answer is to look at averages and the average is exactly what is hiding the problem. Tail latency has a short list of causes and they are all structural.Open full answer →
