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  1. MariaDB ColumnStore
  2. MCOL-5474

Mutex lock contention doing block cache lookup when loading a block

Details

    • New Feature
    • Status: Stalled (View Workflow)
    • Critical
    • Resolution: Unresolved
    • 22.08.8, 23.02.1
    • None
    • PrimProc
    • 2023-11, 2023-12, 2024-1, 2024-2

    Description

      A shared mutex contention in FileBufferMgr::findPtr becomes visible after MCOL-5472 is resolved and VSS cache is disabled.
      The mutex in findPtr controls access to LRU cache structures.
      The suggested solution is to horizontally scale LRU and mutex using hash(LBID) mod scaling_factor.

      Attachments

        Issue Links

          is part of

          Bug - A problem which impairs or prevents the functions of the product. MCOL-5460 concurrent CTE operation excessive mutex

          • Critical - Crashes, loss of data, severe memory leak.
          • Stalled

          Activity

            Transition Time In Source Status Execution Times
            Roman made transition -
            Open In Progress
            		1m 14s 1
            Roman made transition -
            In Progress In Review
            		216d 15h 33m 1
            Roman made transition -
            In Review Stalled
            		1d 18h 47m 1
            Roman made transition -
            Stalled In Progress
            		3s 1
            JiraAutomate made transition -
            In Progress Stalled
            		80d 24m 1

            People

              drrtuy Roman
              drrtuy Roman
              Leonid Fedorov Leonid Fedorov
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              Dates

                Created:
                Updated:

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