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From Andrew Fung <af...@medallia.com>
Subject Re: running Apache Ignite in docker with cgroups
Date Fri, 22 Jun 2018 16:44:42 GMT
Thanks! Wasn't aware of these!

On Fri, Jun 22, 2018 at 7:14 AM, David Wimsey <dwimsey@bandwidth.com> wrote:

> Are you enabling the extra flags required for the JVM work detect memory
> and work properly?
>
> Specifically adding the following options to the JVM options when starting
> ignite
>
> -XX:+UseCGroupMemoryLimitForHeap. The -XX:+UnlockExperimentalVMOptions
>
> See: https://blogs.oracle.com/java-platform-group/java-se-
> support-for-docker-cpu-and-memory-limits
>
>
> > On Jun 21, 2018, at 5:32 PM, Andrew Fung <afung@medallia.com> wrote:
> >
> > I can see from the docs for IgniteConfiguration that some properties
> auto-size based on visible OS resources. In docker, "visible" ends up being
> the host values, which will exceed any CPU/memory limits applied via
> cgroups to the container.
> >
> > I see on IgniteConfiguration.DataStorageConfiguration.DataRegionConfiguration
> the properties initialSize and maxSize, which I've set substantially lower
> than the container memory allocation, which helped avoid being killed due
> to exceeding memory limits, but I'm still seeing the oom reaper kick in
> occasionally. Am I missing some other configuration value that controls
> off-heap memory use?
> >
> > I've set the DataRegionConfiguration initial/max size to 16GB, the JVM
> heap to 8GB, and the container is currently allocated 32GB, which seems
> more than enough for OS and other ancillary uses. In case relevant, I've
> enabled persistence, and set the relevant CacheConfiguration to partitioned
> mode with backups=2 and writeSynchronizationMode=full_sync. Running
> Ignite 2.5.0, Oracle JDK 8u172.
> >
> > Thanks!
> > Andrew.
>
>


-- 
*Andrew Fung*
Engineering  | ❖ Medallia
afung@medallia.com

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