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https://issues.apache.org/jira/browse/IGNITE-4374?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15727320#comment-15727320
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Denis Magda commented on IGNITE-4374:
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I'm not sure that GC logging is related to {{GridPerformanceSuggestions}}
somehow. I would add it under kind of {{GridDebuggingSuggestions}} section.
In addition, I would suggest tune {{sqlOffHeapCacheRowSize}} if the off-heap
mode is used for a cache.
> 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
> Reporter: Yakov Zhdanov
>
> 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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