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https://issues.apache.org/jira/browse/FLINK-15962?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhijiang closed FLINK-15962.
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Resolution: Fixed
Merged in master : 0bc38ba058165aa6751e7e4c654e37203df3aa35
> Reduce the default chunk size in netty stack
> --------------------------------------------
>
> Key: FLINK-15962
> URL: https://issues.apache.org/jira/browse/FLINK-15962
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Network
> Reporter: Zhijiang
> Assignee: Yun Gao
> Priority: Major
> Labels: pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> The current default chunk size inside netty stack is 16MB, and one arena
> would create multiple chunks based on demands. But it does not mean that the
> new chunk is created after the previous one was fully exhausted, which would
> further boost the direct memory overhead.
> In order to decrease the total memory overhead caused by netty, we can reduce
> the default chunk size and measure the effect via existing e2e, and also
> verify the performance concern via the benchmarks.
> This improvement is orthogonal to the
> [FLINK-10742|https://issues.apache.org/jira/browse/FLINK-10742]
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