Uploaded image for project: 'WiredTiger'
  1. WiredTiger
  2. WT-2243

Don't keep transaction IDs pinned for reading from checkpoints

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: WT2.7.0
    • Labels:
      None

      Description

      We currently treat all btree cursors the same, and make sure that a transactional context is setup for reads before the cursor is positioned. However, for cursors on checkpoints, this is unnecessary because checkpoints are read-only and thus don't need to distinguish between multiple versions of updates.

      There are several workloads that should be improved by not allocating snapshots when reading from checkpoints, including test/checkpoint and LSM Bloom / merge operations.

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                michael.cahill Michael Cahill
                Reporter:
                michael.cahill Michael Cahill
              • Votes:
                0 Vote for this issue
                Watchers:
                3 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: