diff --git a/modules/elasticsearch/src/main/java/org/elasticsearch/indices/memory/IndexingMemoryBufferController.java b/modules/elasticsearch/src/main/java/org/elasticsearch/indices/memory/IndexingMemoryBufferController.java
index 322945d7265..743c1608359 100644
--- a/modules/elasticsearch/src/main/java/org/elasticsearch/indices/memory/IndexingMemoryBufferController.java
+++ b/modules/elasticsearch/src/main/java/org/elasticsearch/indices/memory/IndexingMemoryBufferController.java
@@ -70,6 +70,7 @@ public class IndexingMemoryBufferController extends AbstractComponent {
 
         this.indexingBuffer = indexingBuffer;
         this.minShardIndexBufferSize = componentSettings.getAsBytesSize("min_shard_index_buffer_size", new ByteSizeValue(4, ByteSizeUnit.MB));
+        // LUCENE MONITOR: Based on this thread, currently (based on Mike), having a large buffer does not make a lot of sense: https://issues.apache.org/jira/browse/LUCENE-2324?focusedCommentId=13005155&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13005155
         this.maxShardIndexBufferSize = componentSettings.getAsBytesSize("max_shard_index_buffer_size", new ByteSizeValue(512, ByteSizeUnit.MB));
 
         logger.debug("using index_buffer_size [{}], with min_shard_index_buffer_size [{}], max_shard_index_buffer_size [{}]", this.indexingBuffer, this.minShardIndexBufferSize, this.maxShardIndexBufferSize);