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Posted to common-dev@hadoop.apache.org by "Daryn Sharp (JIRA)" <ji...@apache.org> on 2017/06/21 16:56:00 UTC
[jira] [Resolved] (HADOOP-14031) Reduce fair call queue performance
impact
[ https://issues.apache.org/jira/browse/HADOOP-14031?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Daryn Sharp resolved HADOOP-14031.
----------------------------------
Resolution: Fixed
All subtasks are complete.
> Reduce fair call queue performance impact
> -----------------------------------------
>
> Key: HADOOP-14031
> URL: https://issues.apache.org/jira/browse/HADOOP-14031
> Project: Hadoop Common
> Issue Type: Bug
> Components: ipc
> Affects Versions: 2.7.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
>
> The fair call queue has performance deficits that create an illusion of reasonable performance under heavy load. However, there is excessive lock contention, priority inversion, and pushback/reconnect issues that combine to create an artificial rate-limiting on the ingress.
> The result is server metrics look good, call queue looks low, yet clients experience dismal latencies.
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