A Glance At The Java Performance Toolbox
summary
Shows how to build tiny container runtimes with jlink and jdeps, then runs a Spring Boot to‑do app under Docker Compose and uses jcmd, jmap, jstat to capture native memory baselines, heap dumps and GC traces; demonstrates enabling Native Memory Tracking (costly) and producing a heap dump for offline analysis, and wires JDK Flight Recorder via JFR streaming into Prometheus/Grafana. JFR adds ~1% overhead when streaming; a reproducible memory leak appears after ~1,000,000 inserts.
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chapters (10)
- 0:00Talk overview
- 1:52Minimal Java container images
- 5:24Custom JREs with jlink
- 11:00Native and heap memory monitoring
- 14:07Spring Boot with Prometheus and Grafana
- 24:29JVM events with JDK Flight Recorder
- 33:52Custom JFR events for insights
- 36:37OpenJDK tool availability
- 38:05Tools on Kubernetes pods
- 39:54Q&A
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