JDBC 批量插入性能

本文介绍了JDBC 批量插入性能的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我需要在 mysql 数据库中插入几亿条记录.我一次批量插入 100 万个.请在下面查看我的代码.它似乎很慢.有什么办法可以优化吗?

I need to insert a couple hundreds of millions of records into the mysql db. I'm batch inserting it 1 million at a time. Please see my code below. It seems to be slow. Is there any way to optimize it?

try { // Disable auto-commit connection.setAutoCommit(false); // Create a prepared statement String sql = "INSERT INTO mytable (xxx), VALUES(?)"; PreparedStatement pstmt = connection.prepareStatement(sql); Object[] vals=set.toArray(); for (int i=0; i<vals.length; i++) { pstmt.setString(1, vals[i].toString()); pstmt.addBatch(); } // Execute the batch int [] updateCounts = pstmt.executeBatch(); System.out.append("inserted "+updateCounts.length);

推荐答案

我在使用 mysql 时遇到了类似的性能问题，并通过设置 useServerPrepStmts 和 rewriteBatchedStatements 属性解决了它在连接网址中.

I had a similar performance issue with mysql and solved it by setting the useServerPrepStmts and the rewriteBatchedStatements properties in the connection url.

Connection c = DriverManager.getConnection("jdbc:mysql://host:3306/db?useServerPrepStmts=false&rewriteBatchedStatements=true", "username", "password");