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  1. WiredTiger
  2. WT-2453

Throughput drop in wtperf evict Jenkins tests

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: WT2.9.0
    • Component/s: None
    • Labels:

      Description

      A recent change to Jenkins led to an unexpected throughput drop in the wtperf evict jobs in Jenkins. The regression was introduced by: http://build.wiredtiger.com:8080/job/wiredtiger-perf-evict/495/

      That is adding in more eviction worker threads to the wtperf configuration files. Which was related to WT-2432.

      Testing with more eviction worker threads is more interesting that testing a single eviction worker - so it is worthwhile understanding the source of the difference.

        Attachments

        1. dev-vs-wt-2453-24-cores.png
          dev-vs-wt-2453-24-cores.png
          46 kB
        2. dev-vs-wt-2453-4-cores.png
          dev-vs-wt-2453-4-cores.png
          43 kB
        3. ev4workers.jpg
          ev4workers.jpg
          61 kB
        4. evict1profile.jpg
          evict1profile.jpg
          17 kB
        5. evict4profile.jpg
          evict4profile.jpg
          18 kB
        6. treewalk.jpg
          treewalk.jpg
          49 kB

          Issue Links

          is depended on by

          Bug - A problem which impairs or prevents the functions of the product. SERVER-22834 1.7x performance regression in random queries

          • Major - P3 - Major loss of function.
          • Closed
          is duplicated by

          Improvement - An improvement or enhancement to an existing feature or task. WT-2511 Recent WT builds have a large perf regression as thread count increases in read only workloads larger than cache

          • Major - P3 - Major loss of function.
          • Closed
          is related to

          Improvement - An improvement or enhancement to an existing feature or task. WT-2544 Fix eviction statistics when clear is configured

          • Major - P3 - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. WT-2545 Investigate eviction tree walk

          • Major - P3 - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. WT-2546 Eviction server not help evict pages sometimes

          • Major - P3 - Major loss of function.
          • Closed

            Activity

              People

              • Assignee:
                sue.loverso Sue LoVerso
                Reporter:
                alexander.gorrod Alexander Gorrod
              • Votes:
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                Watchers:
                5 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: