diff --git a/configs/milvus.yaml b/configs/milvus.yaml
index add1aca542..968e279e25 100644
--- a/configs/milvus.yaml
+++ b/configs/milvus.yaml
@@ -146,7 +146,7 @@ proxy:
   # As of today (2.2.0 and after) it is strongly DISCOURAGED to set maxFieldNum >= 64.
   # So adjust at your risk!
   maxFieldNum: 64
-  maxShardNum: 64 # Maximum number of shards in a collection
+  maxShardNum: 16 # Maximum number of shards in a collection
   maxDimension: 32768 # Maximum dimension of a vector
   # Whether to produce gin logs.\n
   # please adjust in embedded Milvus: false
diff --git a/pkg/util/paramtable/component_param.go b/pkg/util/paramtable/component_param.go
index d90ae2117f..6e61e71cbd 100644
--- a/pkg/util/paramtable/component_param.go
+++ b/pkg/util/paramtable/component_param.go
@@ -949,7 +949,7 @@ So adjust at your risk!`,
 
 	p.MaxShardNum = ParamItem{
 		Key:          "proxy.maxShardNum",
-		DefaultValue: "64",
+		DefaultValue: "16",
 		Version:      "2.0.0",
 		PanicIfEmpty: true,
 		Doc:          "Maximum number of shards in a collection",