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https://issues.apache.org/jira/browse/HDDS-14752?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Tsz-wo Sze updated HDDS-14752:
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Parent: HDDS-10338
Issue Type: Sub-task (was: Bug)
> Performance degradation in stream GET due to delayed semaphore/permit release
> at block EOF
> ------------------------------------------------------------------------------------------
>
> Key: HDDS-14752
> URL: https://issues.apache.org/jira/browse/HDDS-14752
> Project: Apache Ozone
> Issue Type: Sub-task
> Components: Ozone Client
> Affects Versions: 2.2.0
> Reporter: Sergey Soldatov
> Assignee: Sergey Soldatov
> Priority: Major
> Fix For: 2.2.0
>
>
> Stream GET/read workloads slow down because we hold the stream-read permit
> for too long. When a block hits EOF, the permit (released by
> {{{}completeStreamRead{}}}) isn’t freed right away. That means other readers
> get stuck waiting even though the block is already done, so queues build up,
> throughput drops, and latency gets worse. In my tests I see performance
> degradation 2-3x times for the regular client and over 10x on s3gateway for
> files with size over several gb.
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