diff --git a/configs/milvus.yaml b/configs/milvus.yaml
index 21c20ec3eb..6d43cc0a24 100644
--- a/configs/milvus.yaml
+++ b/configs/milvus.yaml
@@ -1026,5 +1026,5 @@ trace:
 #milvus will automatically initialize half of the available GPU memory,
 #maxMemSize will the whole available GPU memory.
 gpu:
-  initMemSize:  # Gpu Memory Pool init size
-  maxMemSize:  # Gpu Memory Pool Max size
+  initMemSize: 2048 # Gpu Memory Pool init size
+  maxMemSize: 4096 # Gpu Memory Pool Max size
diff --git a/pkg/util/paramtable/component_param.go b/pkg/util/paramtable/component_param.go
index b68d2b7eaa..6c84430fa0 100644
--- a/pkg/util/paramtable/component_param.go
+++ b/pkg/util/paramtable/component_param.go
@@ -922,18 +922,20 @@ type gpuConfig struct {
 
 func (t *gpuConfig) init(base *BaseTable) {
 	t.InitSize = ParamItem{
-		Key:     "gpu.initMemSize",
-		Version: "2.3.4",
-		Doc:     `Gpu Memory Pool init size`,
-		Export:  true,
+		Key:          "gpu.initMemSize",
+		Version:      "2.3.4",
+		Doc:          `Gpu Memory Pool init size`,
+		Export:       true,
+		DefaultValue: "2048",
 	}
 	t.InitSize.Init(base.mgr)
 
 	t.MaxSize = ParamItem{
-		Key:     "gpu.maxMemSize",
-		Version: "2.3.4",
-		Doc:     `Gpu Memory Pool Max size`,
-		Export:  true,
+		Key:          "gpu.maxMemSize",
+		Version:      "2.3.4",
+		Doc:          `Gpu Memory Pool Max size`,
+		Export:       true,
+		DefaultValue: "4096",
 	}
 	t.MaxSize.Init(base.mgr)
 }