Java Performance in Containers

Performance Tuning of the JVM inside Containers

We'd like to learn your experience with running and tuning JVM-based microservices inside containers.

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* 1. Do you deploy JVM-based microservices inside containers?

Yes

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* 2. How best would you characterize the majority of these microservices?

CPU intensive (e.g. 3D rendering, financial, scientific models, machine learning models, audio/video processing, data mining)

Memory intensive (e.g. big data analysis, in-memory data grids)

I/O intensive (e.g. file processing, network calls)

I don't know

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* 3. Do you give a limit of CPUs to the containers?

Yes

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* 4. If you do provide CPU limits, how many CPUs on average do you limit your containers to?

1 CPU

2 CPUs

3 CPUs

4 CPUs

8 CPUs

More than 8 CPUs

I do not limit CPUs on my containers

Other (please specify)

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* 5. Do you give a limit of Memory to the containers?

Yes

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* 6. If you do provide Memory limits to the container, how much memory on average do you limit them to?

64 MB

128 MB

256 MB

512 MB

1 GB

2 GB

4 GB

8 GB

16 GB

32 GB

I do not limit RAM for the containers

Other amount (please specify MB/GB/TB)

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* 7. Do you adjust the JVM Heap Size to better fit in the container?

Yes, with -Xmx

Yes, with -XX:MaxRAMPercentage

Yes, with a different flag (please comment)

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* 8. Do you know which Garbage Collector is ultimately used by the JVM on your microservices?

Yes, all of them

Yes, most of them

Yes, some of them

No, none of them

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* 9. Which Garbage Collector are your workloads described above using the most?

SerialGC

ParallelGC

ParallelOldGC

CMS

G1GC

ZGC

Shenandoah GC

Zing C4

Epsilon GC

I do not know

Other (please specify)

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* 10. JVM Ergonomics: If you do NOT explicitly select a Garbage Collector, how satisfied are you with the JVM Ergonomics for the workloads described above?

Very satisfied

Satisfied

Neither satisfied nor dissatisfied

Dissatisfied

Very dissatisfied

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* 11. GC Tuning: If you DO explicitly select a specific Garbage Collector for your workloads, or you know which one is in use, how are you satisfied with this garbage collector?

Very satisfied

Satisfied

Neither satisfied nor dissatisfied

Dissatisfied

Very dissatisfied

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* 12. GC Tuning: Do you know if a specific value for GC Threads is provided?

Yes, GC Threads is manually tuned.

No, GC Threads is not manually tuned.

I do not know

I do not specify a GC

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* 13. Could you provide more insights into what most of your microservices are doing on average and how are they implemented (choice of framework, Java version, etc)

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* 14. Would you like to be contacted by the Microsoft Java Engineering Group for an in-depth discussion on this topic and share your experience and feedback?

Name

Email Address