Tuning JVM apps got a lot easier with Java Flight Recorder. Instead of invasive profilers, we could now trace hotspots with minimal overhead.
Key wins:
- Identify GC pauses and allocation spikes
- Analyze lock contention
- Correlate thread dumps with memory usage
Trigger recording via:
jcmd <pid> JFR.start name=debug duration=60s filename=recording.jfr
And view with Java Mission Control (JMC).
JVM observability keeps getting better.