33 lines
1.1 KiB
JavaScript
33 lines
1.1 KiB
JavaScript
/**
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* Test that the "group" command yields periodically (SERVER-1395).
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*/
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(function() {
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'use strict';
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const nDocsToInsert = 300;
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const worksPerYield = 50;
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// Start a mongod that will yield every 50 work cycles.
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var conn =
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MongoRunner.runMongod({setParameter: `internalQueryExecYieldIterations=${worksPerYield}`});
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assert.neq(null, conn, 'mongod was unable to start up');
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var coll = conn.getDB('test').yield_group;
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var bulk = coll.initializeUnorderedBulkOp();
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for (var i = 0; i < nDocsToInsert; ++i) {
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bulk.insert({_id: i});
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}
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var res = bulk.execute();
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assert.writeOK(res);
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assert.eq(nDocsToInsert, res.nInserted, tojson(res));
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// A "group" command performing a collection scan should yield approximately
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// nDocsToInsert / worksPerYield times.
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var explain =
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coll.explain('executionStats').group({key: {_id: 1}, reduce: function() {}, initial: {}});
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var numYields = explain.executionStats.executionStages.saveState;
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assert.gt(numYields, (nDocsToInsert / worksPerYield) - 2, tojson(explain));
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})();
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