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  1. WiredTiger
  2. WT-3435

Lookaside eviction should be able to save unstable updates

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major - P3
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 3.6.0-rc0, WT3.0.0
    • Component/s: None
    • Labels:

      Description

      During lookaside eviction, updates that are committed but not yet stable are included in pages written to data files. If a subsequent checkpoint includes such a page, then updates could become durable before they are stable.

      A test case for this would run with logging disabled, fix an oldest timestamp, then insert enough data to trigger lookaside eviction. Then take a checkpoint as of the pinned oldest timestamp. If the checkpoint contains any of the inserts then lookaside eviction has made changes durable too soon.

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          depends on

          Bug - A problem which impairs or prevents the functions of the product. WT-3617 lookaside with timestamps: heap-use-after-free

          • Major - P3 - Major loss of function.
          • Closed
          is duplicated by

          Improvement - An improvement or enhancement to an existing feature or task. WT-3554 Extend timestamp test to trigger eviction

          • Major - P3 - Major loss of function.
          • Closed
          related to

          Bug - A problem which impairs or prevents the functions of the product. WT-3406 Reconciliation is choosing reserved records for writing.

          • Major - P3 - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. WT-3521 Unstable updates should not be written by lookaside eviction

          • Major - P3 - Major loss of function.
          • Closed
          links to

          Web Link pull request

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              People

              • Assignee:
                michael.cahill Michael Cahill
                Reporter:
                michael.cahill Michael Cahill
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                Dates

                • Created:
                  Updated:
                  Resolved: