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  1. WiredTiger
  2. WT-4105

Optimize cache usage for update workload with history pinned

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Details

    • Improvement
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • None
    • 3.6.6, 4.0.0-rc5, WT3.1.0, 4.1.1
    • None
    • None
    • Storage Non-NYC 2018-06-04, Storage Non-NYC 2018-06-18

    Description

      Workloads that insert a large value, and then do many WT_CURSOR->modify operations to make many small updates to the value while holding the oldest transaction/timestamp pinned can generate very large pages in cache, and force us to regularly re-write the page via lookaside.

      Which leads to effectively pinning the cache full.

      We could do better by decreasing how often we instantiate a full value in such workloads, so there is less memory pinned in cache.

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              vamsi.krishna@mongodb.com Vamsi Boyapati
              alexander.gorrod@mongodb.com Alexander Gorrod
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                Created:
                Updated:
                Resolved: