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  1. Jenkins
  2. JENKINS-27650

Page loads slow with hundreds of throttled builds in queue

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      When there are hundreds of throttled builds in the queue, page loads increase by an order of magnitude.

      Steps to reproduce:

      1. Run Jenkins 1.580.2 and latest throttle-concurrent-builds plugin
      2. Create a matrix job with 200 combinations (attached)
      3. In the same job, select "Throttle Concurrent Builds" with a maximum of 7 builds throttled as part of a category called 'semaphore'
      4. Set number of executors on the 'master' queue to 200
      5. Run the job. There should only be 7 builds running due to the throttling

      Page load times will increase by an order of magnitude – I observed 10 seconds from 

      time curl http://localhost:8080/jenkins/ajaxBuildQueue

      If you remove the throttling in the job configuration, the page load times will be under 50 ms.

        1. config.xml
          7 kB
          Ryan Campbell
        2. threaddump.txt
          139 kB
          Ryan Campbell

            Unassigned Unassigned
            recampbell Ryan Campbell
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              Created:
              Updated: