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Posted to issues@flink.apache.org by "Weijie Guo (Jira)" <ji...@apache.org> on 2023/04/13 03:17:00 UTC
[jira] [Updated] (FLINK-31763) Convert requested buffers to overdraft buffers when pool size is decreased
[ https://issues.apache.org/jira/browse/FLINK-31763?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Weijie Guo updated FLINK-31763:
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Summary: Convert requested buffers to overdraft buffers when pool size is decreased (was: Ensure that the total number of requested buffers does not exceed poolSize + maxOverdraftBuffersPerGate)
> Convert requested buffers to overdraft buffers when pool size is decreased
> ---------------------------------------------------------------------------
>
> 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
> Priority: Major
> Labels: pull-request-available
>
> As we discussed in FLINK-31610, new buffers can be requested only 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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