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Java/JVM Ops Learning Roadmap

Operating and troubleshooting JVM-based services in production.

Estimated time:4–6 weeks

1🌱

Phase 1 — Fundamentals

JVM architecture (heap, stack, metaspace)

Class loading basics

JVM flags & startup tuning

Container resource limits & the JVM

2🧠

Garbage collectors (G1, ZGC, Shenandoah)

GC log analysis

Heap dump analysis (Eclipse MAT)

Native memory tracking

3🔥

Thread dumps & deadlock detection

jstack/jmap/jcmd toolchain

Flight Recorder / async-profiler

Diagnosing OOMKilled in Kubernetes

4📈

important

JVM metrics exposition (Micrometer/JMX)

Sizing heap vs container memory limits

Rolling restarts & graceful shutdown

Capacity planning under load

Begin with interview questions to assess your current level.