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The Observability day at Kubecon London confirmed that OpenTelemetry (the most active CNCF project after Kubernetes) is now production ready for most components - certainly the Java agent.

The (mainly free) vendor-owned implementations of the other most interesting components (eg the collector, the operator, the eBPF profiler) are also production ready, though the non-vendor versions are not quite there - but I estimate even these should be production ready later this year or early next year.

What this means is that you need to choose your back-end Observability solution from the available vendors depending on your functional, throughput, storage and cost requirements (eg Elastic Observability). But for input into your chosen back-end, you can now make the easy decision of the OpenTelemetry components that suits your system architecture.

Now on to all the usual newsletter list of links, tips, tools, news and talks, and as usual I've extracted all the tips into this month's tips page.

A note from this newsletter's sponsor

News

Java performance tuning related news

• Updated the thread analyzers tools page
• Async-profiler version 4.0 released, includes heatmaps and native memory leak profiling
• Good talk about the Java memory model with a nice point that volatile does NOT force writes directly to main memory - it ensures visibility to other threads, and that could be handled with a CPU cache update instead of main memory update (though in either case all threads that read the value will see the update so this is more an interesting item than a useful one)

Tools

Java performance tuning related tools

• ThreadAnalyzer - Java thread dump analyzer
• Liberica JVM is a JVM 8 runtime adapted with the JVM 17 core for the performance enhancements - including JVM 17 version garbage collectors, including ZGC and Shenadoah
• An automated heap dump analysis pipeline

Articles

• Observability for developers (Melvin Visch/Devoxx)
• Advanced Java Performance Optimisation: A Deep Dive into Memory, Threading, and Modern JVM (Trek/Trek)
• How Your Code Structure Is Causing Java Memory Leaks (Skilled Coder/Skilled Coder)

Jack Shirazi

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