DOCS-16150 AutoMerger release notes (#3339)

* DOCS-16150 AutoMerger release notes

* addl

* internal review

* external review feedback

Author: jmd-mongo

source/release-notes/7.0.txt

@@ -77,14 +77,32 @@ completed the query:
 New Parameters
 ~~~~~~~~~~~~~~
 
-``balancerMigrationsThrottlingMs`` Parameter
-````````````````````````````````````````````
+autoMergerIntervalSecs Parameter
+````````````````````````````````
+
+MongoDB 7.0 adds the :parameter:`autoMergerIntervalSecs` parameter 
+which, when {+auto-merge-upper+} is enabled, specifies the amount of 
+time between {+auto-merge-action+} rounds, in seconds. 
+``autoMergerIntervalSecs`` can only be set on config servers of sharded
+clusters.
+
+autoMergerThrottlingMS Parameter
+````````````````````````````````
+
+MongoDB 7.0 adds the :parameter:`autoMergerThrottlingMS` which, when 
+{+auto-merge-upper+} is enabled, specifies the minimum amount time 
+between merges initiated by the {+auto-merge-upper+} on the same 
+collection, in milliseconds. ``autoMergerThrottlingMS`` can only be set
+on config servers of sharded clusters.
+
+balancerMigrationsThrottlingMs Parameter
+````````````````````````````````````````
 
 MongoDB 7.0 adds the :parameter:`balancerMigrationsThrottlingMs`
 parameter which allows you to throttle the balancing rate.
 
-``gEnableDetailedConnectionHealthMetricLogLines`` Parameter
-```````````````````````````````````````````````````````````
+gEnableDetailedConnectionHealthMetricLogLines Parameter
+```````````````````````````````````````````````````````
 
 MongoDB 7.0 adds the :parameter:`gEnableDetailedConnectionHealthMetricLogLines`
 parameter which lets you specify whether or not a set of :ref:`log messages 
@@ -140,6 +158,38 @@ on the :dbcommand:`delete` command:
 
 .. include:: /includes/time-series/fact-delete-operations-list.rst
 
+.. _7.0-sharding:
+
+Sharding
+--------
+
+mergeAllChunksOnShard Command
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Starting in MongoDB 7.0, the :dbcommand:`mergeAllChunksOnShard` command
+finds and merges all :ref:`mergeable chunks <mergeability>` that a shard 
+owns for a given collection.
+
+The {+auto-merge-upper+}
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+Starting in MongoDB 7.0, :ref:`the {+auto-merge-upper+} 
+<automerger-concept>` can automatically merge chunks that meet the 
+:ref:`mergeability requirements <mergeability-concept>`. The 
+{+auto-merge-upper+} is enabled by default. 
+
+For details on which settings to customize for your deployment, see
+:ref:`AutoMerger Policy <automerge-policy-settings>`.
+
+enableAutoMerger Parameter for configureCollectionBalancing
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Starting in MongoDB 7.0, the :dbcommand:`configureCollectionBalancing`
+command accepts the ``enableAutoMerger`` parameter. Use 
+``enableAutoMerger`` to set whether or not the 
+:ref:`{+auto-merge-upper+} <automerger-concept>` takes this collection 
+into account.
+
 .. _7.0-upgrade:
 
 Upgrade Procedures