JVM Performance

Always configure the JVM — default settings were designed for 2000s-era environments.

When to Use This Skill

• Configure JVM for Docker containers or Kubernetes
• Choose and tune the Garbage Collector (GC)
• Diagnose OutOfMemoryError, high pause times, or CPU throttling
• Interpret Prometheus executor metrics in Spring Boot
• Compare scale up vs scale out strategies for JVMs

JVM Ergonomics

Use -XX:+PrintFlagsFinal to view all active JVM settings.