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Posted to issues@ozone.apache.org by "Attila Doroszlai (Jira)" <ji...@apache.org> on 2024/07/06 10:43:00 UTC

[jira] [Assigned] (HDDS-11100) OM/SCM Metrics support displaying Netty off-heap memory.

     [ https://issues.apache.org/jira/browse/HDDS-11100?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Attila Doroszlai reassigned HDDS-11100:
---------------------------------------

    Assignee: Shilun Fan

> OM/SCM Metrics support displaying Netty off-heap memory.
> --------------------------------------------------------
>
>                 Key: HDDS-11100
>                 URL: https://issues.apache.org/jira/browse/HDDS-11100
>             Project: Apache Ozone
>          Issue Type: Improvement
>          Components: OM, SCM
>    Affects Versions: 1.4.1
>            Reporter: Shilun Fan
>            Assignee: Shilun Fan
>            Priority: Major
>              Labels: pull-request-available
>
> During a recent period, our cluster's DataNode (DN) exhibited high off-heap memory utilization, triggering frequent system.gc() calls. Upon reading relevant GC logs, we observed normal heap memory usage and monitored heap metrics. It became apparent that off-heap memory usage might be causing the system.gc() calls. We identified that DataNode can display off-heap memory usage, which indirectly helped us infer potential off-heap memory overflow. In HDDS-9070, we now support displaying Netty off-heap memory usage on DataNode, facilitating off-heap memory monitoring. Similarly, we can display Netty off-heap memory usage on OM and SCM.



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