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  1. Core Server
  2. SERVER-61235

Cannot set wiredTigerConcurrentWriteTransactions/wiredTigerConcurrentReadTransactions without casting the value

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    • Icon: Bug Bug
    • Resolution: Won't Fix
    • Icon: Major - P3 Major - P3
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    • Storage Execution
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    • Execution Team 2022-06-13

    Description

      The wiredTigerConcurrentWriteTransactions and wiredTigerConcurrentReadTransactions server parameters can't be set via the db.adminCommand() helper directly.

      For example:

      MongoDB shell version v5.0.2
      MongoDB server version: 5.0.2
      ================
      MongoDB Enterprise > db.adminCommand({ setParameter: 1, wiredTigerConcurrentWriteTransactions: 256 })
      {
              "ok" : 0,
              "errmsg" : "Did not consume whole string.",
              "code" : 9,
              "codeName" : "FailedToParse"
      }
      

      Casting the value to either NumberInt or NumberLong addresses this:

      MongoDB Enterprise > db.adminCommand({ setParameter: 1, wiredTigerConcurrentWriteTransactions: NumberInt(256) })
      { "was" : 128, "ok" : 1 }
      MongoDB Enterprise > db.adminCommand({ setParameter: 1, wiredTigerConcurrentWriteTransactions: NumberLong(256) })
      { "was" : 256, "ok" : 1 }
      

      Note this does not reproduce in mongosh:

      Using MongoDB:          5.0.2
      Using Mongosh:          0.15.6
      ------
      Enterprise test> db.adminCommand({ setParameter: 1, wiredTigerConcurrentWriteTransactions: 256 })
      { was: 128, ok: 1 }
      

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            backlog-server-execution Backlog - Storage Execution Team
            alex.bevilacqua@mongodb.com Alex Bevilacqua
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