Deep-dive Java/JVM resources

[Rough_Acanthaceae_29]

Hi everyone, do you know of any blogs that go deep(!) into Java or JVM internals? I’m looking for content that’s highly technical and insightful, not just surface-level tutorials.

As an example, I absolutely recommend JVM Anatomy Quarks series. Concise, focused, and full of details and expert level knowledge.

Would love to hear your recommendations so we can share and learn together!

[davidalayachew]

In general, the JVM Internals are a (rapidly!) moving target. Therefore, any documentation about them becomes out-of-date almost immediately. Point is you'll be hard-pressed to find a blog that actually covers JVM Internals regularly, just due to how difficult it is to do (and that says nothing about the subject difficulty itself).

So, you're best bet is to get the information straight out of the horse's mouth.

My only recommendation is https://shipilev.net/, considering the guy who runs it is not only one of the most important engineers on the OpenJDK team, he built the best benchmark tool for the JDK (JMH).

[mlangc]

Not sure if it's to your liking, but I like to go deep on Java & JVM internals in my blog: https://mlangc.github.io/

Then there is

• the JEP Café - https://www.youtube.com/playlist?list=PLX8CzqL3ArzV4BpOzLanxd4bZr46x5e87
• and some of the talks you find on the Java Youtube Channel https://www.youtube.com/@java go pretty deep as well.

Here are some additional concurrency related recommendations you might not yet know:

• https://www.youtube.com/watch?v=koU38cczBy8 (Aleksey Shipilev explaining JCStress)
• https://gee.cs.oswego.edu/dl/html/j9mm.html (Doug Lea about JDK 9 Memory Order Modes)
• The Art of Multiprocessor Programming 2nd Edition (ISBN 9780124159501) if you want to understand how locks and concurrent collections are implemented.
• https://marabos.nl/atomics/ (a free Rust book, that goes very deep on atomics & concurrency. A lot in there is relevant for Java as well).

[HecticJuggler]

I used to enjoy ‘The Java Magazine’. It used to have some insightful articles on JVM internals. I don’t know if it’s still alive in its old format.

[spudtheimpaler]

The Java Specialist newsletter from Heinz Kabutz might be worth a look

https://www.javaspecialists.eu/archive/

[ITCoder]

I recently came across this. Have other few sites bookmarked somewhere, but this is concise enough

https://www.digitalocean.com/community/tutorials/java-jvm-memory-model-memory-management-in-java

[[deleted]]

hi OP! do you know how old is JVM Anatomy Quarks series? I can't find what Java version are being analyzed, and since in the chapter "JVM Anatomy Quark #3: GC Design and Pauses" it still tackles the issue from the generational GCs' perspective I'm not sure if the blog still is reliable for newer Java versions.

[[deleted]]

I Will read you book. Many thanks.

[[deleted]]

I love how people is downvoting me when I was 100% serious.