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  1. Core Server
  2. SERVER-80491

Expose more granular metrics around balancing round

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    • Sharding EMEA
    • Fully Compatible
    • v7.1, v7.0, v6.0, v5.0, v4.4, v4.2
    • Sharding EMEA 2023-09-18
    • 2

    Description

      We observed that in large cluster with lots of collections/chunks the balancer can take several seconds to decide which chunks to move in each round.

      The goal of this ticket is to include this time in the round details stored in config.actionlog

      E.g.

      {
        "times":
          "selectionTimeMillis": <>,
          "throttleTimeMillis": <>,
          "migrationTimeMillis": <>,
      }
      

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            tommaso.tocci@mongodb.com Tommaso Tocci
            tommaso.tocci@mongodb.com Tommaso Tocci
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