Job Manager heap metrics

[RKandoji]

Hi,

Could someone please tell me what is the best way to check amount of heap consumed by Job Manager?

Currently I added huge heap of 20GB for both Job Manager and Task Manager. I'm able to see task manager heap usage on UI but not for Job Manager.

I would like to decide how much heap to allocate based on usage.

Also is there any relationship between heap memory settings and checkpointing, I did not see any but curious.

Thanks,

RK

[Biao Liu]

Hi RKandoji,

> Could someone please tell me what is the best way to check amount of heap consumed by Job Manager?

I'm not sure if there is a best way to achieve this. However there are some workaround ways.

1. Through metrics [1]

2. Print GC in stdout. You could achieve it through config item "env.java.opts.jobmanager", like "env.java.opts.jobmanager: -XX:+PrintGCDetails".

> Also is there any relationship between heap memory settings and checkpointing, I did not see any but curious.

I guess there is no direct relationship between memory settings ant checkpointing. However I don't think there is a short answer which could explain this clearly. Like OOM or heavy full GC, they could affect almost everything, of course checkpointing is also included :)

[1] https://ci.apache.org/projects/flink/flink-docs-release-1.9/monitoring/metrics.html#memory

On Fri, 17 Jan 2020 at 09:12, RKandoji <[hidden email]> wrote:

Hi,

Could someone please tell me what is the best way to check amount of heap consumed by Job Manager?

Currently I added huge heap of 20GB for both Job Manager and Task Manager. I'm able to see task manager heap usage on UI but not for Job Manager.

I would like to decide how much heap to allocate based on usage.

Also is there any relationship between heap memory settings and checkpointing, I did not see any but curious.

Thanks,

RK