Profiling and monitoring with the JDK
summary
Java Flight Recorder (JFR) in OpenJDK (since Java 11) provides low‑overhead production profiling (typically under 3%, often below 1%) by recording ~250 built‑in events in JDK 17 to binary files or live streams. The talk covers using JFR and the jfr CLI or JDK Mission Control for analysis, the Java 9+ custom event API, Java 14 live streaming, Java 16’s jdk:ObjectAllocation event, and integration with tools like JMC, VisualVM, and jfr‑unit for tests.
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chapters (27)
- 0:00Start
- 0:15The JVM
- 1:43Profiling and monitoring
- 2:29Historical tools
- 3:55Jean-Michel DOUDOUX
- 4:51Roadmap
- 6:09Analogy with aviation
- 7:10Java Development Kit Flight Recorder
- 8:32Usage conditions
- 10:18JFR elements
- 12:03Internal collection
- 12:41Recording management
- 16:01Configuration of collected information
- 16:15Standard profiles
- 18:43Exploitation of files
- 19:04Java Mission Control
- 19:57Different versions
- 20:31Binary providers
- 21:03Proposed features
- 21:21JVM Browser
- 21:38JMX Console
- 22:52Java Flight Recorder plugin
- 27:03Creating an event
- 28:04Emitting an event
- 29:05Creating a JFR file
- 30:51JFR Event Streaming
- 38:06Use JFR and JMC
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