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https://issues.apache.org/jira/browse/IGNITE-4374?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15856561#comment-15856561
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Denis Magda commented on IGNITE-4374:
-------------------------------------
[~daradurvs]
Please address these notes:
* Add dot (.) to the end of every sentence.
* Rephrase this sentence {{Enable the thread-local allocation blocks (add
'-XX:+UseTLAB' to JVM options).}}
* The OS suggestions below need to be clarified in a similar form you did for
JVM ones:
{{Speed up flushing of dirty pages by OS (alter vm.dirty_writeback_centisecs
and vm.dirty_expire_centisecs paramteres by setting to 500).}}
{{Reduce pages swapping ratio (set vm.swappiness=10).}}
{{Adjust NUMA zones reclamation setting (set vm.zone_reclaim_mode=0).}}
{{Avoid direct reclaim and page allocation failures (set vm.extra_free_kbytes
to 1240000 or other value).}}
> Ignite should validate JVM and OS configuration and output warning in log
> -------------------------------------------------------------------------
>
> Key: IGNITE-4374
> URL: https://issues.apache.org/jira/browse/IGNITE-4374
> Project: Ignite
> Issue Type: Improvement
> Components: documentation
> Reporter: Yakov Zhdanov
> Assignee: Vyacheslav Daradur
> Attachments: x32_not_optimized.png, x32_optimized.png,
> x64_not_optimized.png, x64_optimized.png
>
>
> Currently we have GridPerformanceSuggestions that output suggestions to logs
> on Ignite start on how Ignite can be improved.
> I suggest to go a little bit deeper and validate more configuration options
> and add validation for JVM and OS settings.
> Ignite should output warning if:
> * GC logging is not enabled
> * MaxDirectMemorySize is not set (-XX:MaxDirectMemorySize)
> * Heap size is greater than 30,5G and JVM cannot use compressed oops
> * Any of the recommended OS setting described here
> https://apacheignite.readme.io/docs/jvm-and-system-tuning are not properly
> set
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