diff --git a/CHANGES.txt b/CHANGES.txt
index 87e7c24417..3879a55ba7 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,4 +1,5 @@
 3.11.3
+ * Reduce nodetool GC thread count (CASSANDRA-14475)
  * Fix New SASI view creation during Index Redistribution (CASSANDRA-14055)
  * Remove string formatting lines from BufferPool hot path (CASSANDRA-14416)
  * Update metrics to 3.1.5 (CASSANDRA-12924)
diff --git a/bin/nodetool b/bin/nodetool
index b1cfba5b03..6456b19b81 100755
--- a/bin/nodetool
+++ b/bin/nodetool
@@ -106,6 +106,7 @@ if [ "x$MAX_HEAP_SIZE" = "x" ]; then
 fi
 
 "$JAVA" $JAVA_AGENT -ea -cp "$CLASSPATH" $JVM_OPTS -Xmx$MAX_HEAP_SIZE \
+        -XX:ParallelGCThreads=1 \
         -Dcassandra.storagedir="$cassandra_storagedir" \
         -Dlogback.configurationFile=logback-tools.xml \
         $JVM_ARGS \