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https://issues.apache.org/jira/browse/SOLR-16605?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jan Høydahl resolved SOLR-16605.
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Fix Version/s: 9.2
Resolution: Fixed
Since the commit was released in 9.2, I'll go ahead and resolve this. Please
open another Jira if you feel there is a better way to pick up CPU load from
Java.
> CPU in UI cloud->nodes is always 0%, even when Solr is very busy.
> -----------------------------------------------------------------
>
> Key: SOLR-16605
> URL: https://issues.apache.org/jira/browse/SOLR-16605
> Project: Solr
> Issue Type: Bug
> Components: Admin UI
> Affects Versions: 9.1
> Reporter: Shawn Heisey
> Assignee: Shawn Heisey
> Priority: Major
> Fix For: 9.2
>
> Attachments: fixcpuadminui-1.patch
>
>
> The Cloud->Nodes section of the admin UI is always reporting 0% CPU even on
> very busy Solr nodes. I thought the attached patch would fix t, but it
> doesn't seem to be working. Instead of always 0%, it now shows an occasional
> 50% or 100%... and even rarer is a different percentage like 84% or 17%. The
> Solr process at that time was usng about 180% CPU (two CPUs in AWS instance).
> Using OperatingSystemMXBean from com.sun instead of java.lang seemed to work
> fine in a quick test program, but it's not working in Solr. I am trying this
> on Ubuntu Linux with OpenJDK 17 and 11.
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