techblog.netflix.com
The Netflix Tech Blog: Node.js in Flames
I want to share some recent learnings from performance tuning this new application stack.We were first clued in to a possible issue when we noticed that request latencies to our Node.js application would increase progressively with time. The app was also burning CPU more than expected, and closely correlated to the higher latency. While using rolling reboots as a temporary workaround, we raced to find the root cause using new performance analysis tools and techniques in our Linux EC2 environment.