Performance Testing Java Applications
summary
Walks through nine concrete steps for Java perf testing and runs live demos: a Spring PetClinic load test driven by JMeter, monitored with VisualVM, JHiccup agent and a GC log analyzer. Measures and correlates GC pauses to hiccup spikes, reporting a P99 around 4–5 ms in the demo, and shows how GC tuning trades frequent short pauses for fewer longer ones. Recommends test on production non‑intrusively when needed, disable swap, allow ~1 hour for JIT warmup, and prefers faster storage for Kafka throughput.
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chapters (10)
- 0:00Performance testing intro
- 6:28Nine steps to success
- 8:13Test goals and metrics
- 15:14Right testing environment
- 24:27OS settings for Java
- 25:51Essential testing tools
- 27:14JHiccup for JVM pauses
- 30:29JMeter demo with Pet Clinic
- 45:08Analyze results and fix issues
- 49:45Q&A
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