Add limit parameter to $or operator to provide control of the number of queries that will be executed in parallel

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    • Type: Improvement
    • Resolution: Done
    • Priority: Major - P3
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    • Affects Version/s: None
    • Component/s: Querying
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      Decide whether or not this is necessary and if it is then implement.

      The current $or operator behaviour executes all clauses of an $or in parallel. The default behaviour should remain unchanged, however is it possible to add a control to limit the number of parallel queries (individual $or clauses executed) launched. With a poorly designed query this can cause performance issues at the mongod level and at a sharded level can trigger timeouts from the mongos processes.

            Assignee:
            Ramon Fernandez Marina
            Reporter:
            Eoin Brazil
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              Created:
              Updated:
              Resolved: