diff --git a/configs/milvus.yaml b/configs/milvus.yaml
index 365cfda2e0..984e55f8cd 100644
--- a/configs/milvus.yaml
+++ b/configs/milvus.yaml
@@ -101,7 +101,7 @@ queryCoord:
   port: 19531
   autoHandoff: true # Enable auto handoff
   autoBalance: true
-  overloadedMemoryThresholdPercentage: 90
+  overloadedMemoryThresholdPercentage: 90 # The threshold percentage that memory overload
   balanceIntervalSeconds: 60
   memoryUsageMaxDifferencePercentage: 30