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  1. Core Server
  2. SERVER-44821

retrieving storage stats for currentOp blocked by slow oplog application

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Details

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • None
    • 4.3.1, 4.2.14
    • Storage
    • None
    • Fully Compatible
    • ALL
    • v4.2
    • Execution Team 2020-01-13
    • 20

    Description

      On a secondary node, the currentOp command includes storage stats in its slow op log. If oplog application is taking too long to apply a batch of operations, this may prevent the currentOp from completing in a timely manner.

      =========

      The defect addressed here primarily involves the Parallel Batch Writer Mutex (PBWM), a logical resource that is required for oplog application on a secondary node. Prior to this fix, it was possible for the database profiler and the currentOp command to compete for the PBWM resource with secondary oplog application.

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        Issue Links

          is related to

          Task - A task that needs to be done. SERVER-38341 Remove Parallel Batch Writer Mutex

          • Major - P3 - Major loss of function.
          • Backlog
          related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-44822 update indexing tests to avoid logging slow operations

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

          Bug - A problem which impairs or prevents the functions of the product. SERVER-44859 plan_cache_index_create.js is blocked on two phase index build commit

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

          Bug - A problem which impairs or prevents the functions of the product. SERVER-45007 PBWM acquisition in GlobalLock constructor ignores deadline

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

          Task - A task that needs to be done. SERVER-39218 Simultaneous index builds improvements to currentOp output for createIndexes

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

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            People

              benety.goh@mongodb.com Benety Goh
              benety.goh@mongodb.com Benety Goh
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              Dates

                Created:
                Updated:
                Resolved: