diff --git a/akka-cluster-sharding/src/main/resources/reference.conf b/akka-cluster-sharding/src/main/resources/reference.conf
index 8f0478b50c..e9cf8fbaf8 100644
--- a/akka-cluster-sharding/src/main/resources/reference.conf
+++ b/akka-cluster-sharding/src/main/resources/reference.conf
@@ -99,6 +99,7 @@ akka.cluster.sharding {
     # The difference between number of shards in the region with most shards and
     # the region with least shards must be greater than (>) the `rebalanceThreshold`
     # for the rebalance to occur.
+    # It is also the maximum number of shards that will start rebalancing per rebalance-interval
     # 1 gives the best distribution and therefore typically the best choice.
     # Increasing the threshold can result in quicker rebalance but has the
     # drawback of increased difference between number of shards (and therefore load)
diff --git a/akka-cluster-sharding/src/main/scala/akka/cluster/sharding/ShardCoordinator.scala b/akka-cluster-sharding/src/main/scala/akka/cluster/sharding/ShardCoordinator.scala
index 5fa2a619ed..bc318aa08c 100644
--- a/akka-cluster-sharding/src/main/scala/akka/cluster/sharding/ShardCoordinator.scala
+++ b/akka-cluster-sharding/src/main/scala/akka/cluster/sharding/ShardCoordinator.scala
@@ -866,7 +866,13 @@ abstract class ShardCoordinator(
       }
     }
 
-  def continueRebalance(shards: Set[ShardId]): Unit =
+  def continueRebalance(shards: Set[ShardId]): Unit = {
+    if (log.isInfoEnabled && (shards.nonEmpty || rebalanceInProgress.nonEmpty)) {
+      log.info(
+        "Starting rebalance for shards [{}]. Current shards rebalancing: [{}]",
+        shards.mkString(","),
+        rebalanceInProgress.keySet.mkString(","))
+    }
     shards.foreach { shard =>
       if (!rebalanceInProgress.contains(shard)) {
         state.shards.get(shard) match {
@@ -885,6 +891,7 @@ abstract class ShardCoordinator(
 
       }
     }
+  }
 
 }