diff --git a/configs/milvus.yaml b/configs/milvus.yaml
index 5f17529e3a3d3..ac7ab8da3f786 100644
--- a/configs/milvus.yaml
+++ b/configs/milvus.yaml
@@ -371,7 +371,7 @@ dataNode:
     flowGraph:
       maxQueueLength: 16 # Maximum length of task queue in flowgraph
       maxParallelism: 1024 # Maximum number of tasks executed in parallel in the flowgraph
-    maxParallelSyncTaskNum: 2 # Maximum number of sync tasks executed in parallel in each flush manager
+    maxParallelSyncTaskNum: 6 # Maximum number of sync tasks executed in parallel in each flush manager
   segment:
     insertBufSize: 16777216 # Max buffer size to flush for a single segment.
     deleteBufBytes: 67108864 # Max buffer size to flush del for a single channel
diff --git a/pkg/util/paramtable/component_param.go b/pkg/util/paramtable/component_param.go
index de12f2f6ca6eb..f258b18757573 100644
--- a/pkg/util/paramtable/component_param.go
+++ b/pkg/util/paramtable/component_param.go
@@ -2398,7 +2398,7 @@ func (p *dataNodeConfig) init(base *BaseTable) {
 	p.MaxParallelSyncTaskNum = ParamItem{
 		Key:          "dataNode.dataSync.maxParallelSyncTaskNum",
 		Version:      "2.3.0",
-		DefaultValue: "2",
+		DefaultValue: "6",
 		Doc:          "Maximum number of sync tasks executed in parallel in each flush manager",
 		Export:       true,
 	}