Uploaded image for project: 'WiredTiger'
  1. WiredTiger
  2. WT-2131

Algorithm used to wait to split into parent can be unfair

    XMLWordPrintableJSON

Details

    • Improvement
    • Status: Closed
    • Major - P3
    • Resolution: Done
    • None
    • WT2.7.0
    • None
    • None

    Description

      There are cases when threads can wait for a long time for a chance to split into their parent. This is possible in a workload that:

      • Has a lot of cache pressure (i.e: relatively small cache and a large number of threads).
      • Generates in-memory internal pages with lots of entries.

      I have seen cases where a thread has waited for over 3 seconds in __split_parent before getting in to do an update.

      Attachments

        Issue Links

          Activity

            People

              alexander.gorrod@mongodb.com Alexander Gorrod
              alexander.gorrod@mongodb.com Alexander Gorrod
              Votes:
              0 Vote for this issue
              Watchers:
              1 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: