diff --git a/src/main/java/com/dashboard/aws/lambda/handler/S3BatchToMySQLHandler.java b/src/main/java/com/dashboard/aws/lambda/handler/S3BatchToMySQLHandler.java
index 82ec08c..2cd38e2 100644
--- a/src/main/java/com/dashboard/aws/lambda/handler/S3BatchToMySQLHandler.java
+++ b/src/main/java/com/dashboard/aws/lambda/handler/S3BatchToMySQLHandler.java
@@ -30,7 +30,7 @@ import java.util.*;
  * table/date/
  *   ├─ 00000001.csv
  *   ├─ 00000002.csv
- *   └─ .processed    ← JSON格式，记录已处理的CSV文件：{"processedFiles": ["00000001.csv", "00000002.csv"]}
+ *   └─ .sync_to_db_processed    ← JSON格式，记录已处理的CSV文件：{"processedFiles": ["00000001.csv", "00000002.csv"]}
  */
 public class S3BatchToMySQLHandler implements RequestHandler<Map<String, Object>, String> {
 
@@ -109,8 +109,8 @@ public class S3BatchToMySQLHandler implements RequestHandler<Map<String, Object>
      * @param timeoutThresholdMs 超时阈值
      */
     private void processTable(String table, LocalDate fileDate, String dateStr, long overallStartTime, long timeoutThresholdMs) {
-        // 进度标记文件：table/date/.processed
-        String markerKey = String.format("%s/%s/.processed", table, dateStr);
+        // 进度标记文件：table/date/.sync_to_db_processed
+        String markerKey = String.format("%s/%s/.sync_to_db_processed", table, dateStr);
         logger.info("[{}][{}] start processing date: {}", DB_SCHEMA, table, dateStr);
 
         try {
@@ -202,7 +202,7 @@ public class S3BatchToMySQLHandler implements RequestHandler<Map<String, Object>
     /**
      * 从S3加载已处理的文件列表
      *
-     * @param markerKey .processed 文件路径
+     * @param markerKey .sync_to_db_processed 文件路径
      * @return 已处理的文件列表
      */
     private Map<String, Integer> loadProcessedFiles(String markerKey) {
@@ -213,7 +213,7 @@ public class S3BatchToMySQLHandler implements RequestHandler<Map<String, Object>
                 return new HashMap<>();
             }
 
-            // 下载 .processed 文件
+            // 下载 .sync_to_db_processed 文件
             byte[] content = s3Service.download(markerKey);
             if (content == null || content.length == 0) {
                 return new HashMap<>();
@@ -232,7 +232,7 @@ public class S3BatchToMySQLHandler implements RequestHandler<Map<String, Object>
     /**
      * 保存已处理的文件进度到S3
      *
-     * @param markerKey .processed 文件路径
+     * @param markerKey .sync_to_db_processed 文件路径
      * @param fileProgress 已处理的文件进度 Map<文件名, 已处理行数>
      */
     private void saveProcessedFiles(String markerKey, Map<String, Integer> fileProgress) {
diff --git a/src/main/java/com/dashboard/aws/lambda/service/MySQLService.java b/src/main/java/com/dashboard/aws/lambda/service/MySQLService.java
index a97dc5b..b2cffd7 100644
--- a/src/main/java/com/dashboard/aws/lambda/service/MySQLService.java
+++ b/src/main/java/com/dashboard/aws/lambda/service/MySQLService.java
@@ -144,6 +144,7 @@ public class MySQLService {
 
                             // 提交当前批次事务，每个批次独立事务，失败不影响其他批次
                             conn.commit();
+                            //成功才加到 total
                             total += batchInserted;
                             batchSuccess = true;