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  1. WiredTiger
  2. WT-2243

Don't keep transaction IDs pinned for reading from checkpoints

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Details

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

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              michael.cahill@mongodb.com Michael Cahill
              michael.cahill@mongodb.com Michael Cahill
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                Created:
                Updated:
                Resolved: