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Comment: Added cron job checking.

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Stack Overflow has this thread on Jenkins High CPU Usage khugepageds.

Solution

  •  Clean up any errant cron jobs.
    No errant cron jobs found.
  •  Kill all of the errant processes.
    CPU came back down to normal, but crept back up as those processes were restarted by some cron job script.
  •  Kill all errant processes and immediately restart server s14 (the server that hosts jenkins and confluence).
    This time, the processes stayed down.
  •  Rebuild Jenkins image with the latest LTS version 2.164.2
  •  Start Technology Nursery services: technologynursery.start
  •  On Jenkins, upgrade all plugins
    CPU utilization has stayed normal (>2%) for the past two hours.  Confluence is responsive again.

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