Issue
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After upgrading BlueOcean you see a major CPU increase in your controllers, leading to an unresponsive UI and slow job execution.
Environment
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CloudBees CI (CloudBees Core) on Modern Cloud Platforms - Managed controller
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CloudBees CI (CloudBees Core) on Modern Cloud Platforms - Operations Center
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CloudBees CI (CloudBees Core) on Traditional Platforms - Client controller
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CloudBees CI (CloudBees Core) on Traditional Platforms - Operations Center
Explanation
According to JENKINS-56773, a previous change on the plugin caused it to perform a series of API calls to the /computers endpoint that cause a CPU overhead and generate performance issues.
Resolution
The BlueOcean Executor Info Plugin should be disabled and uninstalled.
Tested Version
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Jenkins LTS 2.249.2