'''nReturned和totalDocsExamined最好接近,查询效率更优''' qp = {'executionStats': {'allPlansExecution': [], 'executionStages': {'advanced': 16591, 'executionTimeMillisEstimate': 4, 'inputStage': {'advanced': 16591, 'alreadyHasObj': 0, 'docsExamined': 24886, # 指定在查询执行阶段扫描的文档数。 'executionTimeMillisEstimate': 3, 'filter': {'$or': [{'room_num': {'$eq': 2}}, {'room_num': {'$eq': 1}}]}, 'inputStage': {'advanced': 24886, 'direction': 'forward', 'dupsDropped': 0, 'dupsTested': 0, 'executionTimeMillisEstimate': 0, 'indexBounds': {'created': ['[new ' 'Date(1603065600000), ' 'new ' 'Date(1603149780000)]']}, 'indexName': 'created_1', 'indexVersion': 2, 'invalidates': 0, 'isEOF': 1, 'isMultiKey': False, 'isPartial': False, 'isSparse': False, 'isUnique': False, 'keyPattern': {'created': 1}, 'keysExamined': 24886, 'multiKeyPaths': {'created': []}, 'nReturned': 24886, 'needTime': 0, 'needYield': 0, 'restoreState': 194, 'saveState': 194, 'seeks': 1, 'seenInvalidated': 0, 'stage': 'IXSCAN', 'works': 24887}, 'invalidates': 0, 'isEOF': 1, 'nReturned': 16591, 'needTime': 8295, 'needYield': 0, 'restoreState': 194, 'saveState': 194, 'stage': 'FETCH', 'works': 24887}, 'invalidates': 0, 'isEOF': 1, 'nReturned': 16591, 'needTime': 8295, 'needYield': 0, 'restoreState': 194, 'saveState': 194, 'stage': 'SUBPLAN', 'works': 24887}, 'executionSuccess': True, 'executionTimeMillis': 79, # 选择查询计划和执行查询所需的总时间(以毫秒为单位) 'nReturned': 16591, # 符合查询条件的文档数。 'totalDocsExamined': 24886, # 查询执行期间检查的文档数。 'totalKeysExamined': 24886}, # 扫描的索引条目数。 'ok': 1.0, 'queryPlanner': {'indexFilterSet': False, # 一个布尔值,指定MongoDB是否对查询应用了索引过滤器。 'namespace': 'yq_info.monitor', # 一个字符串,它指定<database>.<collection>要对其运行查询的集合名称 'parsedQuery': {'$or': [{'$and': [{'room_num': {'$eq': 1}}, {'created': { '$lte': datetime.datetime(2020, 10, 19, 23, 23)}}, {'created': { '$gte': datetime.datetime(2020, 10, 19, 0, 0)}}]}, {'$and': [{'room_num': {'$eq': 2}}, {'created': { '$lte': datetime.datetime(2020, 10, 19, 23, 23)}}, {'created': { '$gte': datetime.datetime(2020, 10, 19, 0, 0)}}]}]}, 'plannerVersion': 1, 'rejectedPlans': [], 'winningPlan': {'inputStage': {'filter': {'$or': [{'room_num': {'$eq': 2}}, {'room_num': {'$eq': 1}}]}, 'inputStage': {'direction': 'forward', 'indexBounds': {'created': ['[new ' 'Date(1603065600000), ' 'new ' 'Date(1603149780000)]']}, 'indexName': 'created_1', 'indexVersion': 2, 'isMultiKey': False, 'isPartial': False, 'isSparse': False, 'isUnique': False, 'keyPattern': {'created': 1}, 'multiKeyPaths': {'created': []}, 'stage': 'IXSCAN'}, 'stage': 'FETCH'}, 'stage': 'SUBPLAN'}}, 'serverInfo': {'gitVersion': '7e28f4296a04d858a2e3dd84a1e79c9ba59a9568', 'host': '0.0.0.0', 'port': 27017, 'version': '4.0.19'}}