Java Mission Control: To Infinity and Beyond…
summary
Java Mission Control (JMC) and Java Flight Recorder (JFR) in OpenJDK 11 collect low‑overhead recordings (about 2 MB/min, <1% overhead) via jcmd/jfr, JMX or JMC templates to capture CPU sampling, object allocations, lock contention and GC pauses. The talk covers extending recordings with custom events or the JMC agent, using JOverflow to find heap anti‑patterns (duplicate strings, small sparse collections), and using JMC libraries to extract data and export collapsed stacks for flamegraphs.
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chapters (9)
- 0:00Introduction to JMC
- 6:42JFR demo
- 12:21JFR template config
- 14:33JFR CLI launch
- 17:22JFR event analysis
- 19:49JMC exploitation
- 23:08JMC programming
- 28:52Export and visualization
- 29:19Q&A
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