JDBC批量插入性能

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 属性解决了这个问题在连接网址中.

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