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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. threaddump.txt
          139 kB
        2. config.xml
          7 kB

          [JENKINS-27650] Page loads slow with hundreds of throttled builds in queue

          Ryan Campbell created issue -
          Oleg Nenashev made changes -
          Link New: This issue is related to JENKINS-20046 [ JENKINS-20046 ]
          Ryan Campbell made changes -
          Attachment New: threaddump.txt [ 28908 ]
          Jesse Glick made changes -
          Assignee Original: Oleg Nenashev [ oleg_nenashev ] New: Jesse Glick [ jglick ]
          Jesse Glick made changes -
          Description Original: When there are hundreds of throttled builds in the queue, page loads increase by an order of magnitude.

          Steps to reproduce:

          # Run Jenkins 1.580.2 and latest throttle-concurrent-builds plugin
          # Create a matrix job with 200 combinations (attached)
          # In the same job, select "Throttle Concurrent Builds" with a maximum of 7 builds throttled as part of a category called 'semaphore'
          # Set number of executors on the 'master' queue to 200
          # 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.           		New: When there are hundreds of throttled builds in the queue, page loads increase by an order of magnitude.

          Steps to reproduce:

          # Run Jenkins 1.580.2 and latest throttle-concurrent-builds plugin
          # Create a matrix job with 200 combinations (attached)
          # In the same job, select "Throttle Concurrent Builds" with a maximum of 7 builds throttled as part of a category called 'semaphore'
          # Set number of executors on the 'master' queue to 200
          # 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 {code:none}time curl http://localhost:8080/jenkins/ajaxBuildQueue{code}

          If you remove the throttling in the job configuration, the page load times will be under 50 ms.
          Ryan Campbell made changes -
          Attachment New: config.xml [ 29000 ]
          Jesse Glick made changes -
          Labels Original: performance New: performance queue
          Jesse Glick made changes -
          Status Original: Open [ 1 ] New: In Progress [ 3 ]
          Jesse Glick made changes -
          Remote Link New: This issue links to "Docker demo to reproduce (Web Link)" [ 12302 ]
          Jesse Glick made changes -
          Remote Link New: This issue links to "PR 27 (Web Link)" [ 12400 ]
          Jesse Glick made changes -
          Link New: This issue is blocking JENKINS-19623 [ JENKINS-19623 ]

            Unassigned Unassigned
            recampbell Ryan Campbell
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            12 Vote for this issue
            Watchers:
            20 Start watching this issue

              Created:
              Updated: