Uploaded image for project: 'WiredTiger'
  1. WiredTiger
  2. WT-9671

Investigate extremely varied checkpoint cleanup statistic in CppSuite test hs_cleanup.

    XMLWordPrintable

Details

    • Task
    • Status: Open
    • Major - P3
    • Resolution: Unresolved
    • None
    • None
    • None
    • StorEng - Refinement Pipeline

    Description

      After the CppSuite tests were moved to a new everygreen variant and a subset were made more stressful (WT-8640), the hs_cleanup test's cc_pages_removed statistic is extremely varied at the end of test runs.

      The latest build shows this clearly in the performance plot generated from the test:

      We can see that prior to the commit identified by the arrow the statistic was noisy to begin with but after WT-8640 the variance between commits has jumped significantly.

      While its unclear if the stat should be generally higher or lower than the commits prior to WT-8640 it is interesting that it shows significant variance between commits and the reason for that should be investigated and understood.

      Scope:

      • Investigate why the statistic is so varied between runs
      • Create follow up ticket to fix the behaviour if possible

      Attachments

        Activity

          People

            backlog-server-storage-engines Backlog - Storage Engines Team
            luke.pearson@mongodb.com Luke Pearson
            Votes:
            0 Vote for this issue
            Watchers:
            2 Start watching this issue

            Dates

              Created:
              Updated: