DOCS-16066 backports DOCS-16048 to v6.0 (#3019)

Author: jmd-mongo

source/reference/parameters.txt

@@ -2914,6 +2914,34 @@ Sharding Parameters
    ``AsyncRequestsSenderUseBaton`` and always enables the performance
    enhancement controlled by the parameter.
 
+.. parameter:: balancerMigrationsThrottlingMs
+
+   .. versionadded:: 7.0 (*Also available starting in 6.3.1, 6.0.6, 5.0.18*)
+
+   *Type*: integer
+
+   *Default*: 1000
+
+   |mongod-only|
+
+   Specifies the minimum amount of time between two consecutive 
+   balancing rounds. This allows you to throttle the balancing
+   rate. This parameter only takes effect on config server nodes.
+
+   This example sets ``balancerMigrationsThrottlingMs`` to 2000 
+   milliseconds at startup:
+
+   .. code-block:: bash
+
+      mongod --setParameter balancerMigrationsThrottlingMs=2000
+
+   During runtime, you can also set the parameter with the
+   :dbcommand:`setParameter` command:
+
+   .. code-block:: javascript
+
+      db.adminCommand( { setParameter: 1, balancerMigrationsThrottlingMs: 2000 } )
+
 .. parameter:: chunkDefragmentationThrottlingMS
 
    .. versionadded:: 5.3