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  1. Core Server
  2. SERVER-19265

Aggregation running only on 8 shards at a time

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    • Type: Icon: Question Question
    • Resolution: Done
    • Priority: Icon: Major - P3 Major - P3
    • None
    • Affects Version/s: 3.0.2
    • Component/s: Aggregation Framework
    • Labels:
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      I'm running aggregations against 12 shards. This is with wired tiger.
      The aggregation is a complex project then a group with sum.

      I see first the aggregation run on 8 shards
      then run on the remaining 4 shards
      then a brief flurry on the primary shard.

      Why is this - should all 12 not run in parallel.

            Assignee:
            mathias@mongodb.com Mathias Stearn
            Reporter:
            john.page@mongodb.com John Page
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              Created:
              Updated:
              Resolved: