Uploaded image for project: 'WiredTiger'
  1. WiredTiger
  2. WT-3739

Some workloads see more transaction conflicts with WT_CURSOR::modify

    XMLWordPrintable

Details

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Done
    • None
    • None
    • None
    • None
    • Storage 2017-11-13, Storage 2017-12-04

    Description

      We have noticed that since enabling the use of WT_CURSOR::modify via the MongoDB updateWithDamages interface, the number of write conflicts returned has increased significantly.

      A particular example is running a YCSB 50/50 read/update workload. The additional conflicts can lead to a reduced performance, since the operations need to be retried.

      We need to investigate why the number of conflicts increased, and hopefully reduce the occurrence.

      Attachments

        Issue Links

          Activity

            People

              keith.bostic@mongodb.com Keith Bostic (Inactive)
              alexander.gorrod@mongodb.com Alexander Gorrod
              Votes:
              0 Vote for this issue
              Watchers:
              8 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: