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My Practical Garbage Collection Tuning For Anyone talk from java2days has been published. I blogged about the talk and made the tuning flow available - here's the flow in chart format (you can view the full size images by opening them in a separate tab or viewer).

I'm unabashed in recommending this as your primary GC tuning resource, I used all the best tips I've found over the years to put that together and produced a top notch modern GC tuning guide relevant to JDKs 8-15 - most other material is old or specific to tuning a particular GC algorithm, I've taken a holistic "tune the JVM" view not a narrow "tune one GC" view. This makes GC tuning much more straightforward, you no longer need to be a guru to get good gains. I've also extracted all the tips into this month's tips page. And of course I have my usual newsletter list of links, tips, tools, news, articles and talks below.

A note from this newsletter's sponsor

News

Java performance tuning related news

• Jeyzer incident management tool show case
• Enum microbenchmarks and a couple of suggestions (For hot paths, consider using your own Map cache of the Enum.valueOf())
• What's new in ZGC in JDK 15
• Java Garbage Collection timestamps in JFR vs logs

Tools

Java performance tuning related tools.

• Generic solution to greatly simplify the agent programming
• Jeyzer thread analyzer
• Jeyzer analyzer now available, various features including contention analysis
• A LookasideCache implementation to let you use the value retrieved by the reader that holds the lease of a cache entry - reduces cache access latency during write-intensive bursts of activity

Articles

• Practical Garbage Collection Tuning For Anyone (Jack Shirazi/Java2days)
• Cache is the Root of All Evil: Avoiding Pitfalls of Common Caching Techniques (Vova Galchenko/Box)
• Building Netflix's Distributed Tracing Infrastructure (Maulik Pandey/Netflix)

Jack Shirazi

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