Jiang Xin created FLINK-35166:
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Summary: Improve the performance of Hybrid Shuffle when enable
memory decoupling
Key: FLINK-35166
URL: https://issues.apache.org/jira/browse/FLINK-35166
Project: Flink
Issue Type: Improvement
Components: Runtime / Network
Reporter: Jiang Xin
Fix For: 1.20.0
Currently, the tiered result partition creates the SortBufferAccumulator with
the number of expected buffers as min(numSubpartitions+1, 512), thus the
SortBufferAccumulator may obtain very few buffers when the parallelism is
small. We can easily make the number of expected buffers 512 by default to have
a better performance when the buffers are sufficient.
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