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  1. Core Server
  2. SERVER-14747

memory leak in the MultiPlanStage

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Details

    • Bug
    • Status: Closed
    • Major - P3
    • Resolution: Fixed
    • 2.7.4
    • 2.7.5
    • Querying
    • Fully Compatible
    • ALL
    • Hide

      Run the following and watch the memory usage using a tool like "top":

      t.drop();
      		 
      t.ensureIndex({a: 1, b: 1});
      		 
      t.ensureIndex({a: 1, c: 1});
      		 
      t.insert({a: 1});
      		 
      for (var i = 0; i < 100000; i++) { t.find({a: 1}).explain(true); }

      Show
      Run the following and watch the memory usage using a tool like "top": t.drop(); t.ensureIndex({a: 1, b: 1}); t.ensureIndex({a: 1, c: 1}); t.insert({a: 1}); for (var i = 0; i < 100000; i++) { t.find({a: 1}).explain(true); }

    Description

      The MultiPlanStage deletes all pointers which it owns, except for the QuerySolution for the winning plan. The MultiPlanStage should either keep ownership of all QuerySolutions, or transfer ownership of the winning solution to the PlanExecutor.

      This issue affects 2.7 versions only, and does not affect any production releases.

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          is related to

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-16889 Query subsystem public API should use std::unique_ptr for ownership transfer

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

          Activity

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              david.storch@mongodb.com David Storch
              david.storch@mongodb.com David Storch
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                Created:
                Updated:
                Resolved: