Java Profiling Workflow / Step 1 / Collect data to measure potential issues

Set up the Java profiling detection phase using a trusted preinstalled async-profiler v4.x, problem-driven interactive profiling scripts, and comprehensive data collection for CPU hotspots, memory leaks, lock contention, GC issues, and I/O bottlenecks. Uses JEP 518 (Cooperative Sampling) and JEP 520 (Method Timing) for reduced overhead.

What is covered in this Skill?

• Run application with profiling JVM flags (run-java-process-for-profiling.sh)
• Interactive profiling script (profiler/scripts/profile-java-process.sh) — copy exact template
• Directory structure: profiler/scripts/, profiler/results/, profiler/current/
• Automated OS/architecture detection and trusted preinstalled async-profiler validation
• CPU, memory, lock, GC, I/O profiling modes
• Flamegraph and JFR output with timestamped results

Scope: Use the exact bash script templates without modification or interpretation.

Constraints

Copy bash scripts exactly from templates. Ensure JVM flags are applied for profiling compatibility. Verify Java processes are running before attaching profiler.