APM
Application Performance Monitoring
ELI5 — The Vibe Check
APM is monitoring on steroids — it doesn't just track if your app is up, it tracks exactly how fast each function runs, which database queries are slow, what each user request did, and where the bottlenecks are. It's like having a detailed X-ray of your app's performance in real time.
Real Talk
Application Performance Monitoring (APM) tools instrument application code to capture distributed traces, transaction profiling, error tracking, and code-level performance data. APM solutions like Datadog APM, New Relic, and Sentry provide end-to-end request tracing across microservices.
When You'll Hear This
"APM shows that 80% of our latency is one slow database query." / "Set up APM to get trace data across all our microservices."
Related Terms
Datadog
Datadog is the premium all-in-one observability platform that enterprise teams buy when they want metrics, logs, traces, APM, and security monitoring from...
Logging
Logging is writing a diary for your program.
Metrics
Metrics are the numbers your app tracks about itself over time — requests per second, error rate, CPU usage, response time, active users.
Monitoring
Monitoring is keeping a constant eye on your app while it runs — tracking whether it's up, how fast it responds, how many errors it throws, and how much me...
New Relic
New Relic is Datadog's main competitor — same idea (unified observability), different pricing model and vibe.
Observability
Observability is the ability to understand what's happening inside your system from the outside, using three types of data: metrics (numbers), logs (events...