Question

我正在使用preparedstatement批量更新/插入将数据存储到数据库中。但是需要3分钟才能将1000个条目持续到SQL Server数据库中。我想知道是否有办法改善表现。请检查下面的代码：

SQL UPDATE STATEMENT

String sqlUpdate = "UPDATE details set a=? , b=? , c=? , d=?, e=? where f=?";
updatePstmt = conn.prepareStatement(sqlUpdate);

public static void updateCustomerDetailByBatch(HashMap<String, String []> updateCustDetails ) {

  final int BATCH_SIZE=1000;
  int batchCtr = 1;

  try{
     conn.setAutoCommit(false);
     MAFLogger.info("Number of Customer details to be updated: "+ updateCustDetails.size());

     for (Map.Entry<String, String []> custEntry: updateCustDetails.entrySet()) {

        String x = custEntry.getValue()[0];
        String y = custEntry.getValue()[1];
        String z = custEntry.getKey();
        String a = custEntry.getValue()[2];
        String b = custEntry.getValue()[3];
        String c = custEntry.getValue()[4];

        updatePstmt.setString(1, x);
        updatePstmt.setString(2, y);
        updatePstmt.setString(3, z);
        updatePstmt.setString(4, a);
        updatePstmt.setString(5, b);
        updatePstmt.setString(6, c);

        updatePstmt.addBatch();

        if (batchCtr % BATCH_SIZE == 0) {
           MAFLogger.debug("Batch Ctr is :  " + batchCtr+ " Updated Batch ");
           updatePstmt.executeBatch();
        }

        batchCtr++;
     }

     if (batchCtr % BATCH_SIZE != 0 ) {

        MAFLogger.debug("Execute remaining batch update statement contents:  "+ batchCtr);
        updatePstmt.executeBatch();

     }

     conn.setAutoCommit(true);

  }catch (SQLException sqlE) {

     MAFLogger.error("Batch update statement problem : " + sqlE);

  }

}

我在这里阅读了有关添加和回答的不同文章，例如link1，link2和link3，但没有任何变化。感谢您是否可以提供帮助。

我在他们的网站“sqljdbc_4.1.5605.100_enu.tar.gz”上可以下载Microsoft JDBC Driver

表索引

index_name          index_description                               index_keys
PK_CC_Details_TEMP  clustered, unique, primary key located on PRIMARY   f

提高性能SQL Server JDBC批处理更新

0 个答案: