Anton Kalashnikov created FLINK-24553:
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Summary: Change buffer debloating default configuration values
Key: FLINK-24553
URL: https://issues.apache.org/jira/browse/FLINK-24553
Project: Flink
Issue Type: Improvement
Components: Runtime / Checkpointing
Affects Versions: 1.14.0
Reporter: Anton Kalashnikov
After the investigation for buffer debloating effectiveness, there are some
conclusion:
* taskmanager.memory.min-segment-size can be decreased from 1024 to at least
256 because in some cases even 1024 is a too big value and at the same time the
low min value is not a problem.
* taskmanager.network.memory.buffer-debloat.samples can be decreased from 20
to 10 or taskmanager.network.memory.buffer-debloat.period can be decreased from
500ms to 100ms or 200ms. According to the investigation, the current speed of
reaction is too slow so it is better to increase it by changing one of these
parameters.
* taskmanager.network.memory.buffer-debloat.threshold-percentages can be
decreased from 50 to 10 because there are no problems were found when the
announcement of buffer size happened more frequently but it actually can
positively influent the checkpoint time.
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