Blog
Posts tagged “Latency”
Monitoring
Deploy markers: tying a latency regression to the release that caused it
p95 doubled, and there were three deploys and a flag flip since yesterday. Deploy markers and a version field on every log line turn "which release did this" into a five-minute query. Here is how to set both up for a Node API.
Monitoring
API latency percentiles: how to read p50, p95 and p99 without fooling yourself
Your average latency says 102 ms; a customer says the app hangs for two seconds. Both are true. Learn to read p50, p95 and p99, avoid the four classic mistakes, and record percentiles per route in Node.