Memory footprint of a Java process by Andrei Pangin
Ғылым және технология
Does JVM option '-Xmx4g' mean that the process will consume up to 4 GB RAM? Certainly not. What else can take virtual memory and how much of it?
The question becomes especially important when running Java in a shared environment or in a container with limited resources. Excessive memory consumption may occur everywhere: from the application code and the libraries to the Java virtual machine and the operating system. While Java memory leaks are usually easy to discover from a heap dump, native memory leaks can be quite confusing.
During this session we will discuss what structures contribute to the JVM footprint. We will study the real cases of native memory leaks and explore the tools useful in memory allocation analysis.
Andrei Pangin leads the development of Odnoklassniki social network, specializing in high performance Java servers. He previously worked on HotSpot JVM, which became his favorite topic and area of expertise. Andrei is also known as top #JVM answerer on Stack Overflow and the author of Async-profiler.
Пікірлер: 24
This is so useful, I can't thank you enough!
that's what a deep dive looks like. EXCELLENT presentation
This is one of the best presentations I’ve seen, great work, thank you very much
The best video about java memory consuption I have seen so far! Thanks a lot for preparing this great talk!
We had been facing issues in production instance of Oracle Service Bus and Weblogic server. Omg this post cleared up so many misconceptions and doubts that we have been going through in our troubleshootings. I really cant thank you enough, this might look simple but it is such deep stuff that application server admins rarely have exposure to. Kudos sir!
Incredible! Loved this talk!
Immensely informative session. After watching one would be able to perform in-depth analysis of different sections of native memory. Grateful for such awesome session.
This is one of the excellent talks
This is very good coverage in one hour
Thank you soooo much for this video, it was a life saver!!!
Extremely informative, thanks!
Круто, спасибо!
Amazing presentation! Well done!
Thanks! Help a lot!!!
Great talk!
Wonderful presentation with great insights, thanks a lot. Regarding adaptive policy, I was reading at some place that in case of Parallel GC, enabling adaptive policy change heap generation sizes dynamically to meet latency and throughput Goals. Can you comment on that?
Hi Andrei our application on Kubernetes is consuming lot of page cache, the page cache continues to grow and ultimately container hits memory limit, what should we do?
Another big footprint (at least for large heaps without large pages is OS Pagetables. This only shows up in Linux slab info (fortunately it’s very linear to application page count).
i'm facing a huge problem of memory increasing and it does not seen to be the heap i'll use this material to try to find ou what could be. thank you very much
anyone help please, where can I get the presentation slides from ?
I too second @SirWolf2018
Why memory is rocket science in Java?
@cosmowanda6460
2 ай бұрын
Anything memory related sounds like rocket science if you skipped your operating systems course.
pshh! Just download more memory.