diff --git a/source/reference/glossary.txt b/source/reference/glossary.txt index b0ca98ef40e..92e94b0f2be 100644 --- a/source/reference/glossary.txt +++ b/source/reference/glossary.txt @@ -442,7 +442,7 @@ Glossary natural order The order in which a database stores documents on disk. Typically, the order of documents on disks reflects - insertion order, *except* when documents move internal because + insertion order, *except* when documents move internally because of document growth due to update operations. However, :term:`Capped collections ` guarantee that insertion order and natural order are identical. @@ -810,9 +810,10 @@ Glossary ages it out. ObjectId - A special 12-byte :term:`BSON` type that has a high probability - an ObjectId represent the time of the ObjectId's - creation. MongoDB uses ObjectId values as the default values for + A special 12-byte :term:`BSON` type that guarantees uniqueness + within the collection. The ObjectID is generated based on + timestamp, machine ID, process ID, and a process-local incremental + counter. MongoDB uses ObjectId values as the default values for :term:`_id` fields. geohash