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> On Apr 9, 2024, at 5:56 PM, Hechao Li (Jira) <j...@apache.org> wrote:
>
> Hechao Li created KAFKA-16496:
> ---------------------------------
>
> Summary: Make the default of receive.buffer.bytes -1 instead of 5
> Key: KAFKA-16496
> URL: https://issues.apache.org/jira/browse/KAFKA-16496
> Project: Kafka
> Issue Type: Improvement
> Reporter: Hechao Li
>
>
> Currently, kafka has a default config receive.buffer.bytes=64k, which
> translates to SO_RCVBUF = 65536. As a result, the Linux kernel can't auto
> tune the receive window. This will cripple performance in many scenarios,
> especially for internet traffic.
>
> In our environment, we have seen a timeout after [a kernel
> patch|https://lore.kernel.org/netdev/20230717152917.751987-1-eduma...@google.com/T/]
> that makes the initial receive window 25% instead of 50% of SO_RCVBUF,
> together with the default request.timeout.ms=30000, it causes an
> application-level timeout.
>
> See also https://lore.kernel.org/all/20240409164355.1721078-1-...@netflix.com/
>
>
>
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