'분류 전체보기' 카테고리의 글 목록 (18 Page)

대용량 데이터를 JDBC로 테스트한 셈플과 결과(1)

2003. 3. 20. 18:16

테스트 사양
P-4 : 1.6
RAM : 512
DB : MySQL 3.23.25 for window
OS : Windows2000 Server
============================================
간단한 insert 소스
----------------------------------------------------

import java.sql.*;

/**
* Title: 
* Description: 
* Copyright: Copyright (c) 2003
* Company: 
* @author not attributable
* @version 1.0
*/

public class DBTest4 {
 String name = null;
 String title = null;
 String track = null;

 public void init() {
 Connection conn = null;
 PreparedStatement stmt = null;

 try {
 Class.forName("org.gjt.mm.mysql.Driver");
 }catch (ClassNotFoundException ex) {
 System.err.println("ClassNotFoundException: " + ex.getMessage());
 }

 try{

 String sql = "insert into musictest values(?, ?, ?, ?, ?)";
 conn = DriverManager.getConnection("jdbc:mysql://localhost/music","music","music");

 for(int i=1; i <= 50000; i++){
 stmt = conn.prepareStatement(sql);
 stmt.setString(1, "jacksun"+i);
 stmt.setString(2, "i love you"+i);
 stmt.setString(3, "2002");
 stmt.setString(4, "musician1"+i);
 stmt.setString(5, "musician2"+i);
 stmt.executeUpdate();
 System.out.println("count : "+i);
 }

 conn.close();
 }catch(Exception e) {
 e.printStackTrace();
 }finally {
 if ( stmt != null ) try{stmt.close();}catch(Exception e){}
 if ( conn != null ) try{conn.close();}catch(Exception e){}
 }
 }

 public static void main(String[] args) {
 DBTest4 db = new DBTest4();
 db.init();
 }
}

==============================================
select 소스
----------------------------------------------------

import java.sql.*;
import java.util.Vector;

/**
* Title: 
* Description: 
* Copyright: Copyright (c) 2003
* Company: 
* @author not attributable
* @version 1.0
*/

public class DBTest2 {

 Vector result = new Vector();

 public void init() {

 long start_full = System.currentTimeMillis();

 String musician, music_subject, music_year, music_write, music_compose = null;
 Connection conn = null;
 Statement stmt = null;

 try {
 Class.forName("org.gjt.mm.mysql.Driver");
 }catch (ClassNotFoundException ex) {
 System.err.println("ClassNotFoundException: " + ex.getMessage());
 }

 try{
 conn = DriverManager.getConnection("jdbc:mysql://localhost/music","music","music");

 if(conn != null) {
 stmt = conn.createStatement();

 long start = System.currentTimeMillis();

 ResultSet rst = stmt.executeQuery("select musician, music_subject, music_year, music_write, music_compose from musictest");

 long end = System.currentTimeMillis();
 double res1 = (double)(end - start) / 1000;
 //System.out.println("start1 : "+start);
 //System.out.println("end2 : "+end);
 System.out.println("res1 : "+res1+"초");

 long start2 = System.currentTimeMillis();

 while(rst.next()) {
 musician = rst.getString(1);
 music_subject = rst.getString(2);
 music_year = rst.getString(3);
 music_write = rst.getString(4);
 music_compose = rst.getString(4);

 Vector row = new Vector();
 row.add(musician);
 row.add(music_subject);
 row.add(music_year);
 row.add(music_write);
 row.add(music_compose);
 result.add(row);
 }
 conn.close();
 long end2 = System.currentTimeMillis();
 double res2 = (double)(end2 - start2) / 1000;

 //System.out.println("start1 : "+start2);
 //System.out.println("end2 : "+end2);
 System.out.println("res2 : "+res2+"초");
 }
 }catch(Exception e) {
 e.printStackTrace();
 }finally {
 if ( stmt != null ) try{stmt.close();}catch(Exception e){}
 if ( conn != null ) try{conn.close();}catch(Exception e){}
 }


 long end_full = System.currentTimeMillis();
 double res_full = (double)(end_full - start_full) / 1000;
 System.out.println("res_full : "+res_full+"초");
 }

 public Vector getResult(){
 return result;
 }

 public static void main(String[] args) {

 DBTest2 db = new DBTest2();
 db.init();
 Vector result = db.getResult();

 long start = System.currentTimeMillis();
 for(int i=0; i < result.size(); i++){
 Vector row = (Vector)result.get(i);

 String musician = (String)row.get(0);
 String music_subject = (String)row.get(1);
 String music_year = (String)row.get(2);
 String music_write = (String)row.get(3);
 String music_compose = (String)row.get(4);

 }
 long end = System.currentTimeMillis();
 double res2 = (double)(end - start) / 1000;
 //System.out.println("start2 : "+start);
 //System.out.println("end2 : "+end);
 System.out.println("res3 : "+res2+"초");
 }
}

=======================================

결과는 이어서 계속 ...

***** 아름다운프로님에 의해서 게시물 복사 + 카테고리변경되었습니다 (2003-12-18 17:44)

Posted by 아름프로

2003년 ~ 2007년 5월

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