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https://issues.apache.org/jira/browse/FLINK-31288?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Weijie Guo closed FLINK-31288.
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Fix Version/s: 1.17.0
Resolution: Fixed
> Disable overdraft buffer for batch shuffle
> ------------------------------------------
>
> Key: FLINK-31288
> URL: https://issues.apache.org/jira/browse/FLINK-31288
> Project: Flink
> Issue Type: Bug
> Affects Versions: 1.17.0, 1.16.1
> Reporter: Weijie Guo
> Assignee: Weijie Guo
> Priority: Blocker
> Labels: pull-request-available
> Fix For: 1.17.0
>
>
> Only pipelined / pipelined-bounded partition needs overdraft buffer. More
> specifically, there is no reason to request more buffers for non-pipelined
> (i.e. batch) shuffle. The reasons are as follows:
> # For BoundedBlockingShuffle, each full buffer will be directly released.
> # For SortMergeShuffle, the maximum capacity of buffer pool is 4 *
> numSubpartitions. It is efficient enough to spill this part of memory to disk.
> # For Hybrid Shuffle, the buffer pool is unbounded. If it can't get a normal
> buffer, it also can't get an overdraft buffer.
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