What is async-profiler and why use it for Java apps?

Async-profiler's a native JVMTI agent for CPU, alloc, lock profiling—loaded dynamically, low overhead, JFR output. Coroot uses it for zero-change insights.

How do I enable Java profiling in Coroot?

Set ENABLE_JAVA_ASYNC_PROFILER=true on node agent env, via Kubernetes CR. Auto-discovers HotSpot JVMs.

Does Coroot's profiler work with existing agents like Datadog?

Yes—scans maps, skips if async-profiler's loaded.

🛠️ Developer Tools

Coroot Cracks Java Profiling: Async-Profiler Hunts Lock Contention Without a Single Restart

Picture this: a Spring Boot app's latency balloons from 10ms to 100ms+ under artificial chaos. Coroot's new async-profiler integration spots the lock contention culprit instantly, flamegraphs and all.

theAIcatchup Apr 09, 2026 4 min read

Flamegraph of Java lock contention spike in Coroot dashboard

⚡ Key Takeaways

Coroot integrates async-profiler for zero-config CPU, allocation, and lock contention profiling in any HotSpot JVM. 𝕏
Dynamic attach via node agent — no flags, restarts, or code changes; detects and skips conflicts automatically. 𝕏
Demo proves it: Spots chaos-induced latency spikes with flamegraphs, turning symptoms into root causes instantly. 𝕏

Published by

theAIcatchup

Community-driven. Code-first.

#Coroot #JVM observability #Java profiling #async-profiler #lock contention

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Originally reported by Dev.to

⚡ Key Takeaways

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