Taking Off With #JDK #FlightRecorder
summary
JDK Flight Recorder runs inside the JVM and records over 180 built‑in events with sub‑1% overhead by default; it starts on a live process via jcmd or JVM args and is inspected with the jfr tool, JFR view/print (JSON) and JDK Mission Control. The demo builds a custom “delay” event by extending jdk.jfr.Event with a threshold so only slow requests are kept — the run captures three slow occurrences. JFR also supports max‑age/size rotation and a jfr scrub utility to remove sensitive fields.
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chapters (14)
- 0:00Introduction to JFR
- 2:29What is JDK Flight Recorder
- 9:32Demo of JFR in action
- 13:32Analyzing JFR recordings
- 20:07Starting JFR on running apps
- 25:29Configuring JFR settings
- 31:38JDK Mission Control overview
- 33:36Custom event configuration
- 38:33Creating custom events
- 43:08JFR scrub utility
- 48:11Best practices for custom events
- 50:40JFR in containers and microservices
- 54:13JFR in automated testing
- 56:16Q&A
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