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  1. WiredTiger
  2. WT-4927

Allow updates with timestamps to be evicted to lookaside

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Details

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • None
    • WT3.2.1, 4.3.1, 4.2.0-rc3
    • None
    • None
    • Storage Engines 2019-07-19

    Description

      Testing of internal MongoDB applications has detected situations where MongoDB 4.2.0-rc2 behaves worse than 4.0.x under cache pressure situations.

      In particular, in situations where 4.0.x would use the cache overflow mechanism to make progress during slow checkpoints, 4.2.0-rc2 instead appears to waste time doing update/restore eviction even when it does not contribute to reducing the volume of dirty data in cache.

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            michael.cahill@mongodb.com Michael Cahill (Inactive)
            michael.cahill@mongodb.com Michael Cahill (Inactive)
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            Dates

              Created:
              Updated:
              Resolved: