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  1. WiredTiger
  2. WT-4842

Enhance lookaside score calculation

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Details

    • Improvement
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • 4.2.0
    • WT3.2.1, 4.3.1, 4.2.0-rc3
    • None
    • 5
    • Storage Engines 2019-06-17, Storage Engines 2019-07-01, Storage Engines 2019-07-19

    Description

      The MongoDB server uses the lookaside score statistic to make decisions about how much cache pressure is being generated by the required history window.

      There are cases where the lookaside score doesn't respond as expected to changes in behavior. We should investigate how to improve lookaside score tracking and the corresponding statistic.

      Attachments

        Issue Links

          is duplicated by

          Task - A task that needs to be done. SERVER-41472 Create a workload to demonstrate the MongoDB usage difficulties of the WT WT_STAT_CONN_CACHE_LOOKASIDE_SCORE stat

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

          Bug - A problem which impairs or prevents the functions of the product. SERVER-41244 The WT inMemory storage engine needs an alternative metric to determine cache pressure for the snapshot window size controls

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

          Activity

            People

              sue.loverso@mongodb.com Susan LoVerso
              alexander.gorrod@mongodb.com Alexander Gorrod
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              Dates

                Created:
                Updated:
                Resolved: