OPERATIONAL DEFECT DATABASE
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I noticed at first when using the Java driver, then when using mongosh, that the database profiler does not record data about getmore commands issued when I am watching a database, but does record those commands when I am watching a collection. I observed this problem with the following setup: OS: macOS ISA: ARM 64 MongoDB: tried both 7.0.5-ent, 7.2.0-ent deployment: P-S-S replica set storage engine: tried both wiredTiger, inMemory
xgen-internal-githook commented on Tue, 14 Jan 2025 11:47:15 +0000: Author: {'name': 'Rui Liu', 'email': '33423526+lriuui0x0@users.noreply.github.com', 'username': 'lriuui0x0'} Message: SERVER-86007 Allow collectionless getMore command to be profiled (#30771) GitOrigin-RevId: 59797f5f1a2bd31b582a5be371ebebe82335a719 Branch: master https://github.com/mongodb/mongo/commit/56c28c994851bd6f9da8b97a4dfbfdd5d3587f16
Run the following code in mongosh use myDb; const session = db.getMongo().startSession(); db = session.getDatabase(db.getName()); db.runCommand({ profile: 0 }); db.dropDatabase(); { db.runCommand({ profile: 2 }) const watchCursor = db.watch(); watchCursor.tryNext(); db.myColl.insertOne({}); db.system.profile.find({}, {op: 1, ns: 1, command: 1}); } db.runCommand({ profile: 0 }); db.dropDatabase(); session.endSession(); and see that only the insert into myDb.myColl is recorded despite the profiling level being 2: [ { op: 'insert', ns: 'myDb.myColl', ... } ] If we do db.myColl.watch() instead of db.watch() in the scenario specified above use myDb; const session = db.getMongo().startSession(); db = session.getDatabase(db.getName()); db.runCommand({ profile: 0 }); db.dropDatabase(); { db.runCommand({ profile: 2 }) const watchCursor = db.myColl.watch(); watchCursor.tryNext(); db.myColl.insertOne({}); db.system.profile.find({}, {op: 1, ns: 1, command: 1}); } db.runCommand({ profile: 0 }); db.dropDatabase(); session.endSession(); then we can see the corresponding getmore commands in system.profile: [ { op: 'getmore', ns: 'myDb.myColl', ... }, { op: 'getmore', ns: 'myDb.myColl', ... }, { op: 'insert', ns: 'myDb.myColl', ... } ]
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