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db.test.drop(); db.test.createIndex({a: 1}) for (var j=0; j < 10; ++j) { db.test.insert({a: j}); } db.setProfilingLevel(2); db.test.update({a: {$gte: 0}}, {$inc: {a: 1}}, {multi: true}); var profileDoc = db.system.profile.find().sort({$natural: -1}).next(); assert.eq(10, profileDoc.keyUpdates, tojson(profileDoc));
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db.test.drop(); db.test.createIndex({a: 1}) for ( var j=0; j < 10; ++j) { db.test.insert({a: j}); } db.setProfilingLevel(2); db.test.update({a: {$gte: 0}}, {$inc: {a: 1}}, {multi: true }); var profileDoc = db.system.profile.find().sort({$natural: -1}).next(); assert .eq(10, profileDoc.keyUpdates, tojson(profileDoc));

The OpDebug::keyUpdates metric is zeroed out on every call to Collection::updateDocument.

This metric will be removed for 3.4 under ~~SERVER-23272~~ but we may want to consider backporting a fix to previous releases.

related to

SERVER-23272 Remove misleading/not useful diagnostic metrics