Shawn Heisey created SOLR-16605:
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Summary: 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
Security Level: Public (Default Security Level. Issues are Public)
Components: Admin UI
Affects Versions: 9.1
Reporter: Shawn Heisey
Assignee: Shawn Heisey
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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