"client" : "127.0.0.1", "allUsers" : [ ], "user" : "" } MongoDB Documentation, Release 3.0.4 For any single operation, the documents created by the database profiler will include a subset of the following fields. The precise selection of fields in these documents depends on the type of operation. Note: For the output specific to the version of your MongoDB, refer to the appropriate version of the MongoDB Manual. The type of operation. The possible values are: system.profile. op Output Reference The namespace the operation targets. Namespaces in MongoDB take the form of the database , followed by a dot ( . ), followed by the name of the collection . The query document (page 96) used, or for an insert operation, the inserted document. If the document exceeds 50 kilobytes, the value is a string summary of the object. If the string summary exceeds 50 kilobytes, the string summary is truncated, denoted with an ellipsis ( ... ) at the end of the string. Changed in version 3.0.4: For "getmore" (page 293) operations on cursors returned from a db.collection.find() or a db.collection.aggregate() , the query (page 293) field contains respectively the query predicate or the issued aggregate command document. For details on the aggregate command document, see the aggregate reference page. The command operation. If the command document exceeds 50 kilobytes, the value is a string summary of the object. If the string summary exceeds 50 kilobytes, the string summary is truncated, denoted with an ellipsis ( ... ) at the end of the string. The <update> document passed in during an update (page 102) operation. If the document exceeds 50 kilo- bytes, the value is a string summary of the object. If the string summary exceeds 50 kilobytes, the string summary is truncated, denoted with an ellipsis ( ... ) at the end of the string. The ID of the cursor accessed by a query and getmore operations. The number of documents the operation specified to return. For example, the profile command would return one document (a results document) so the ntoreturn (page 293) value would be 1 . The limit(5) command would return five documents so the ntoreturn (page 293) value would be 5 . • command • getmore • remove • update • insert • query system.profile. ns system.profile. query system.profile. command system.profile. updateobj system.profile. cursorid system.profile. ntoreturn 293 5.3. Administration Reference