JDBC批量Insert深度優化

awen7916發表於2016-01-12
JDBC優化
JDBC批量Insert深度優化（有事務）
 
環境：
MySQL 5.1
RedHat Linux AS 5
JavaSE 1.5
DbConnectionBroker 微型資料庫連線池
 
測試的方案：
執行10萬次Insert語句，使用不同方式。
 
A組：靜態SQL，自動提交，沒事務控制（MyISAM引擎）
1、逐條執行10萬次
2、分批執行將10萬分成m批，每批n條，分多種分批方案來執行。
 
B組：預編譯模式SQL，自動提交，沒事務控制（MyISAM引擎）
1、逐條執行10萬次
2、分批執行將10萬分成m批，每批n條，分多種分批方案來執行。
-------------------------------------------------------------------------------------------
C組：靜態SQL，不自動提交，有事務控制（InnoDB引擎）
1、逐條執行10萬次
2、分批執行將10萬分成m批，每批n條，分多種分批方案來執行。
 
D組：預編譯模式SQL，不自動提交，有事務控制（InnoDB引擎）
1、逐條執行10萬次
2、分批執行將10萬分成m批，每批n條，分多種分批方案來執行。
 
本次主要測試C、D組，並得出測試結果。
 
SQL程式碼
DROP TABLE IF EXISTS tuser;

CREATE TABLE tuser (
    id bigint(20) NOT NULL AUTO_INCREMENT,
    name varchar(12) DEFAULT NULL,
    remark varchar(24) DEFAULT NULL,
    createtime datetime DEFAULT NULL,
    updatetime datetime DEFAULT NULL,
    PRIMARY KEY (id)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;
 
C、D組測試程式碼：
package testbatch;

import java.io.IOException;
import java.sql.*;

/**
* JDBC批量Insert優化（下）
*
* @author leizhimin 2009-7-29 10:03:10
*/
public class TestBatch {
        public static DbConnectionBroker myBroker = null;

        static {
                try {
                        myBroker = new DbConnectionBroker("com.mysql.jdbc.Driver",
                                        "jdbc:mysql://192.168.104.163:3306/testdb",
                                        "vcom", "vcom", 2, 4,
                                        "c:\\testdb.log", 0.01);
                } catch (IOException e) {
                        e.printStackTrace();
                }
        }

        /**
         * 初始化測試環境
         *
         * @throws SQLException 異常時丟擲
         */
        public static void init() throws SQLException {
                Connection conn = myBroker.getConnection();
                conn.setAutoCommit(false);
                Statement stmt = conn.createStatement();
                stmt.addBatch("DROP TABLE IF EXISTS tuser");
                stmt.addBatch("CREATE TABLE tuser (\n" +
                                "    id bigint(20) NOT NULL AUTO_INCREMENT,\n" +
                                "    name varchar(12) DEFAULT NULL,\n" +
                                "    remark varchar(24) DEFAULT NULL,\n" +
                                "    createtime datetime DEFAULT NULL,\n" +
                                "    updatetime datetime DEFAULT NULL,\n" +
                                "    PRIMARY KEY (id)\n" +
                                ") ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8");
                stmt.executeBatch();
                conn.commit();
                myBroker.freeConnection(conn);
        }

        /**
         * 100000條靜態SQL插入
         *
         * @throws Exception 異常時丟擲
         */
        public static void testInsert() throws Exception {
                init();         //初始化環境
                Long start = System.currentTimeMillis();
                for (int i = 0; i < 100000; i++) {
                        String sql = "\n" +
                                        "insert into testdb.tuser \n" +
                                        "\t(name, \n" +
                                        "\tremark, \n" +
                                        "\tcreatetime, \n" +
                                        "\tupdatetime\n" +
                                        "\t)\n" +
                                        "\tvalues\n" +
                                        "\t('" + RandomToolkit.generateString(12) + "', \n" +
                                        "\t'" + RandomToolkit.generateString(24) + "', \n" +
                                        "\tnow(), \n" +
                                        "\tnow()\n" +
                                        ")";
                        Connection conn = myBroker.getConnection();
                        conn.setAutoCommit(false);
                        Statement stmt = conn.createStatement();
                        stmt.execute(sql);
                        conn.commit();
                        myBroker.freeConnection(conn);
                }
                Long end = System.currentTimeMillis();
                System.out.println("單條執行100000條Insert操作，共耗時：" + (end - start) / 1000f + "秒！");
        }

        /**
         * 批處理執行靜態SQL測試
         *
         * @param m 批次
         * @param n 每批數量
         * @throws Exception 異常時丟擲
         */
        public static void testInsertBatch(int m, int n) throws Exception {
                init();             //初始化環境
                Long start = System.currentTimeMillis();
                for (int i = 0; i < m; i++) {
                        //從池中獲取連線
                        Connection conn = myBroker.getConnection();
                        conn.setAutoCommit(false);
                        Statement stmt = conn.createStatement();
                        for (int k = 0; k < n; k++) {
                                String sql = "\n" +
                                                "insert into testdb.tuser \n" +
                                                "\t(name, \n" +
                                                "\tremark, \n" +
                                                "\tcreatetime, \n" +
                                                "\tupdatetime\n" +
                                                "\t)\n" +
                                                "\tvalues\n" +
                                                "\t('" + RandomToolkit.generateString(12) + "', \n" +
                                                "\t'" + RandomToolkit.generateString(24) + "', \n" +
                                                "\tnow(), \n" +
                                                "\tnow()\n" +
                                                ")";
                                //加入批處理
                                stmt.addBatch(sql);
                        }
                        stmt.executeBatch();    //執行批處理
                        conn.commit();
//                        stmt.clearBatch();        //清理批處理
                        stmt.close();
                        myBroker.freeConnection(conn); //連線歸池
                }
                Long end = System.currentTimeMillis();
                System.out.println("批量執行" + m + "*" + n + "=" + m * n + "條Insert操作，共耗時：" + (end - start) / 1000f + "秒！");
        }

        /**
         * 100000條預定義SQL插入
         *
         * @throws Exception 異常時丟擲
         */
        public static void testInsert2() throws Exception {     //單條執行100000條Insert操作，共耗時：40.422秒！
                init();         //初始化環境
                Long start = System.currentTimeMillis();
                String sql = "" +
                                "insert into testdb.tuser\n" +
                                "    (name, remark, createtime, updatetime)\n" +
                                "values\n" +
                                "    (?, ?, ?, ?)";
                for (int i = 0; i < 100000; i++) {
                        Connection conn = myBroker.getConnection();
                        conn.setAutoCommit(false);
                        PreparedStatement pstmt = conn.prepareStatement(sql);
                        pstmt.setString(1, RandomToolkit.generateString(12));
                        pstmt.setString(2, RandomToolkit.generateString(24));
                        pstmt.setDate(3, new Date(System.currentTimeMillis()));
                        pstmt.setDate(4, new Date(System.currentTimeMillis()));
                        pstmt.executeUpdate();
                        conn.commit();
                        pstmt.close();
                        myBroker.freeConnection(conn);
                }
                Long end = System.currentTimeMillis();
                System.out.println("單條執行100000條Insert操作，共耗時：" + (end - start) / 1000f + "秒！");
        }

        /**
         * 批處理執行預處理SQL測試
         *
         * @param m 批次
         * @param n 每批數量
         * @throws Exception 異常時丟擲
         */
        public static void testInsertBatch2(int m, int n) throws Exception {
                init();             //初始化環境
                Long start = System.currentTimeMillis();
                String sql = "" +
                                "insert into testdb.tuser\n" +
                                "    (name, remark, createtime, updatetime)\n" +
                                "values\n" +
                                "    (?, ?, ?, ?)";
                for (int i = 0; i < m; i++) {
                        //從池中獲取連線
                        Connection conn = myBroker.getConnection();
                        conn.setAutoCommit(false);
                        PreparedStatement pstmt = conn.prepareStatement(sql);
                        for (int k = 0; k < n; k++) {
                                pstmt.setString(1, RandomToolkit.generateString(12));
                                pstmt.setString(2, RandomToolkit.generateString(24));
                                pstmt.setDate(3, new Date(System.currentTimeMillis()));
                                pstmt.setDate(4, new Date(System.currentTimeMillis()));
                                //加入批處理
                                pstmt.addBatch();
                        }
                        pstmt.executeBatch();    //執行批處理
                        conn.commit();
//                        pstmt.clearBatch();        //清理批處理
                        pstmt.close();
                        myBroker.freeConnection(conn); //連線歸池
                }
                Long end = System.currentTimeMillis();
                System.out.println("批量執行" + m + "*" + n + "=" + m * n + "條Insert操作，共耗時：" + (end - start) / 1000f + "秒！");
        }

        public static void main(String[] args) throws Exception {
                init();
                Long start = System.currentTimeMillis();
                System.out.println("--------C組測試----------");
                testInsert();
                testInsertBatch(100, 1000);
                testInsertBatch(250, 400);
                testInsertBatch(400, 250);
                testInsertBatch(500, 200);
                testInsertBatch(1000, 100);
                testInsertBatch(2000, 50);
                testInsertBatch(2500, 40);
                testInsertBatch(5000, 20);
                Long end1 = System.currentTimeMillis();
                System.out.println("C組測試過程結束，全部測試耗時：" + (end1 - start) / 1000f + "秒！");

                System.out.println("--------D組測試----------");
                testInsert2();
                testInsertBatch2(100, 1000);
                testInsertBatch2(250, 400);
                testInsertBatch2(400, 250);
                testInsertBatch2(500, 200);
                testInsertBatch2(1000, 100);
                testInsertBatch2(2000, 50);
                testInsertBatch2(2500, 40);
                testInsertBatch2(5000, 20);

                Long end2 = System.currentTimeMillis();
                System.out.println("D組測試過程結束，全部測試耗時：" + (end2 - end1) / 1000f + "秒！");
        }
}
 
執行結果：
--------C組測試----------
單條執行100000條Insert操作，共耗時：103.656秒！
批量執行100*1000=100000條Insert操作，共耗時：31.328秒！
批量執行250*400=100000條Insert操作，共耗時：31.406秒！
批量執行400*250=100000條Insert操作，共耗時：31.75秒！
批量執行500*200=100000條Insert操作，共耗時：31.438秒！
批量執行1000*100=100000條Insert操作，共耗時：31.968秒！
批量執行2000*50=100000條Insert操作，共耗時：32.938秒！
批量執行2500*40=100000條Insert操作，共耗時：33.141秒！
批量執行5000*20=100000條Insert操作，共耗時：35.265秒！
C組測試過程結束，全部測試耗時：363.656秒！
--------D組測試----------
單條執行100000條Insert操作，共耗時：107.61秒！
批量執行100*1000=100000條Insert操作，共耗時：32.64秒！
批量執行250*400=100000條Insert操作，共耗時：32.641秒！
批量執行400*250=100000條Insert操作，共耗時：33.109秒！
批量執行500*200=100000條Insert操作，共耗時：32.859秒！
批量執行1000*100=100000條Insert操作，共耗時：33.547秒！
批量執行2000*50=100000條Insert操作，共耗時：34.312秒！
批量執行2500*40=100000條Insert操作，共耗時：34.672秒！
批量執行5000*20=100000條Insert操作，共耗時：36.672秒！
D組測試過程結束，全部測試耗時：378.922秒！
 
 
測試結果意想不到吧，最短時間竟然超過上篇。觀察整個測試結果，發現總時間很長，原因是逐條執行的效率太低了。

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