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https://issues.apache.org/jira/browse/KAFKA-7129?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16531083#comment-16531083
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Antony Stubbs commented on KAFKA-7129:
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One thing to be careful is of course detecting the core count properly. E.g.
when running the jvm on k8s, it uses too many threads for GC - it must be set
explicitly.
> Dynamic default value for number of thread configuration
> --------------------------------------------------------
>
> Key: KAFKA-7129
> URL: https://issues.apache.org/jira/browse/KAFKA-7129
> Project: Kafka
> Issue Type: Improvement
> Components: core
> Reporter: Damien Gasparina
> Priority: Minor
>
> There are properties in the broker to change the number of thread of a
> component (e.g. _num.replica.fetchers_ or _num.network.threads_). After
> discussing with [~astubbs], it seems that the default values are optimized
> for an 8 CPU machine and might not be optimized for larger machine (e.g. 48
> cores).
> For those larger machine, an admin need to tune them to be able to use all
> resources of the host.
> Having dynamic default value (e.g. _num.replica.fetchers_ = _ceil(number of
> core / 8)_, etc...) instead of static (e.g. _num.replica.fetchers =1_) could
> be a more efficient strategy to have default values optimized for different
> kind of deployment.
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