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  1. Core Server
  2. SERVER-83186

Writers can get stuck in cache eviction without rolling back transactions in order to make progress

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    • Type: Icon: Bug Bug
    • Resolution: Unresolved
    • Priority: Icon: Major - P3 Major - P3
    • None
    • Affects Version/s: None
    • Component/s: None
    • Labels:
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    • Storage Execution
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    • 4

      For a workload with many threads performing medium-sized writes (unlike SERVER-61909 where there is a single large transaction which cannot fit in cache), especially one with prepared transactions since those cannot be rolled back, we can end up in a scenario where eviction cannot make meaningful progress. The threads performing the writes are being co-opted into performing eviction and cannot return until sufficient eviction progress is made, so they can essentially all become stuck as a result.

            Assignee:
            backlog-server-execution [DO NOT USE] Backlog - Storage Execution Team
            Reporter:
            gregory.noma@mongodb.com Gregory Noma
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              Created:
              Updated: