Update source/reference/server-status.txt

Author: comerford

source/reference/server-status.txt

@@ -552,6 +552,62 @@ opcounters
    of commands issued to the database since the :program:`mongod`
    instance last started.
 
+opcountersRepl
+-----------
+
+.. status:: opcountersRepl
+
+   The :status:`opcountersRepl` data structure, similar to the 
+   :status:`opcounters` data structure, provides an overview of
+   database replication operations by type and makes it possible to 
+   analyze the load on the replica in more granular manner.  These
+   values only appear when the current host has replication enabled.
+
+   These values will differ from the primary :status:`opcounters` because 
+   of how operations are serialized during replication.  See 
+   :doc:`/core/replication` for more information on replication.
+
+   These numbers will grow over time and in response to database
+   use. Analyze these values over time to track database utilization.
+
+.. status:: opcountersRepl.insert
+
+   :status:`opcountersRepl.insert` provides a counter of the total number
+   of replicated insert operations since the :program:`mongod` instance 
+   last started.
+
+.. status:: opcountersRepl.query
+
+   :status:`opcountersRepl.query` provides a counter of the total number
+   of replicated queries since the :program:`mongod` instance last 
+   started.
+
+.. status:: opcountersRepl.update
+
+   :status:`opcountersRepl.update` provides a counter of the total number
+   of replicated update operations since the :program:`mongod` instance 
+   last started.
+
+.. status:: opcountersRepl.delete
+
+   :status:`opcountersRepl.delete` provides a counter of the total number
+   of replicated delete operations since the :program:`mongod` instance 
+   last started.
+
+.. status:: opcountersRepl.getmore
+
+   :status:`opcountersRepl.getmore` provides a counter of the total number
+   of "getmore" operations since the :program:`mongod` instance last
+   started. This counter can be high even if the query count is low.
+   Secondary nodes send ``getMore`` operations as part of the replication
+   process.
+
+.. status:: opcountersRepl.command
+
+   :status:`opcountersRepl.command` provides a counter of the total number
+   of replicated commands issued to the database since the 
+   :program:`mongod` instance last started.
+
 asserts
 -------