Weijie Guo created FLINK-31763:
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Summary: Ensure that the total number of requested buffers does
not exceed poolSize + maxOverdraftBuffersPerGate
Key: FLINK-31763
URL: https://issues.apache.org/jira/browse/FLINK-31763
Project: Flink
Issue Type: Bug
Components: Runtime / Network
Affects Versions: 1.17.1
Reporter: Weijie Guo
Assignee: Weijie Guo
As we discussed in FLINK-31610, new buffers can be requested when
"{_}numOfRequestedMemorySegments + numberOfRequestedOverdraftMemorySegments <
poolSize + maxOverdraftBuffersPerGate"{_}.
Consider such a scenario, the {{{}CurrentPoolSize = 5{}}},
{{{}numOfRequestedMemorySegments = 7{}}}, {{{}maxOverdraftBuffersPerGate =
2{}}}. If {{{}numberOfRequestedOverdraftMemorySegments = 0{}}}, then 2 buffers
can be requested now.
We should convert {{numberOfRequestedMemorySegments}} to
{{numberOfRequestedOverdraftMemorySegments}} when poolSize is decreased.
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