diff --git a/source/reference/method/db.printReplicationInfo.txt b/source/reference/method/db.printReplicationInfo.txt
index 76baaba631c..695be55aca3 100644
--- a/source/reference/method/db.printReplicationInfo.txt
+++ b/source/reference/method/db.printReplicationInfo.txt
@@ -14,6 +14,23 @@ db.printReplicationInfo()
    .. |method| replace:: :method:`db.printReplicationInfo()`
    .. |method-alternative| replace:: :method:`db.getReplicationInfo()`
 
+   Use this method to check the size of the oplog for a given
+   :term:`replica set` member, connect to the member in a :program:`mongo`
+   shell and run the :method:`ds.printReplicationInfo()` method.
+
+   The output displays the size of the oplog and the date ranges of the
+   operations contained in the oplog. In the following example, the oplog
+   is about 10MB and is able to fit about 26 hours (94400 seconds) of
+   operations:
+
+   .. code-block:: javascript
+   
+      configured oplog size:   10.10546875MB
+      log length start to end: 94400 (26.22hrs)
+      oplog first event time:  Mon Mar 19 2012 13:50:38 GMT-0400 (EDT)
+      oplog last event time:   Wed Oct 03 2012 14:59:10 GMT-0400 (EDT)
+      now:                     Wed Oct 03 2012 15:00:21 GMT-0400 (EDT)
+
    .. include:: /includes/note-method-does-not-return-json.rst
 
    The output of :method:`db.printReplicationInfo()` is identical to