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https://issues.apache.org/jira/browse/FLINK-21777?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yingjie Cao updated FLINK-21777:
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Description: Currently, the sort-merge shuffle implementation uses 4M
unmanaged direct memory as cache for data writing. It can be replaced by the
writev system call which can reduce the unmanaged direct memory usage without
any performance loss. (was: Currently, the sort-merge shuffle implementation
uses 4M unmanned direct memory as cache for data written. It can be replaced by
the writev system call which can reduce the unmanned direct memory usage
without any performance loss.)
> Replace the 4M data writing cache of sort-merge shuffle with writev system
> call
> -------------------------------------------------------------------------------
>
> Key: FLINK-21777
> URL: https://issues.apache.org/jira/browse/FLINK-21777
> Project: Flink
> Issue Type: Sub-task
> Components: Runtime / Network
> Affects Versions: 1.12.0
> Reporter: Yingjie Cao
> Priority: Major
> Fix For: 1.13.0
>
>
> Currently, the sort-merge shuffle implementation uses 4M unmanaged direct
> memory as cache for data writing. It can be replaced by the writev system
> call which can reduce the unmanaged direct memory usage without any
> performance loss.
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