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  1. WiredTiger
  2. WT-5599

Explore discarding obsolete updates when checkpointing

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    Details

    • Type: Improvement
    • Status: Open
    • Priority: Major - P3
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: 4.3 Desired
    • Component/s: None
    • Labels:
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      Description

      When walking the update chain during a checkpoint if there are updates older than the oldest, potentially they can be discarded by calling __wt_update_obsolete_check(). This will help free some cache of the obsolete content as part of the checkpoint. We already do this check as part of eviction.

      We will need to study if it is safe to call __wt_update_obsolete_check() as part of the checkpoint, because we do not have exclusive access to the page.

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            • Assignee:
              backlog-server-storage-engines Backlog - Storage Engines Team
              Reporter:
              sulabh.mahajan Sulabh Mahajan
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              • Created:
                Updated: