MYSQL读写性能测试的简单记录

进行测试之前首先保证你已经可以对数据库进行读写：参见

要求：对MYSQL数据库的读写读写性能进行测试。支持多并发、支持调整事物提交记录数。

注意事项：

要运行测试需要

1. 需要修改数据库的配置信息DB_DRIVER、DB_URL、DB_USERNAME、DB_PASSWORD；

2.DB_URL中还要指定哪个数据库。“dbc:mysql://localhost:3306/test”其中的test就是我锁用的那个数据库；

3. 修改TABLE_NAME指定数据库测试的表名(此处是student表)，测试程序会查询这个表的定义来生成写入SQL语句；

4.还有此语句 if (column.equalsIgnoreCase("name")) 中的那么为你创建的表的key，这个也要对用调整过来；

5. 修改concurrentList指定需要测试并发数列表，默认测试1,5,10,20四种并发数；

6. 修改batchSizeList指定每次测试的事务提交记录数据，默认是100,200,500,1000

最后运行测试，会生成类似下面的结果：

测试完成后检查该student表，输入select * from student; 可以看到源源不断的数据的输出，插入的表项太多了。

具体查了多少数据呢？使用select count(*) from student;查看。

可能遇到的问题：

（1）UUID.randomUUID().toString()生成的主键会很长，因此主键name的长度应设的长一些否则会出现如下报错：

由上上截图可以看到生成的主键还是蛮长的。

（2）每次测试的时候最好将上一次测试的table删除重新建一个。否则测试的数据之间相差很大。

建立student表的SQL语句如下：

?

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--删除student表的SQL语句 drop table student; --查询表格项数大小的语句 select count (*) from student;     --建立student表，注意key的预留空间较大 create table student ( name varchar (120) not null , goal varchar (20) not null , primary key ( name ));

程序代码如下：

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import java.sql.Connection; import java.sql.DriverManager; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import java.sql.SQLException; import java.sql.Statement; import java.sql.Timestamp; import java.sql.Types; import java.util.ArrayList; import java.util.Calendar; import java.util.Collections; import java.util.Formatter; import java.util.LinkedHashMap; import java.util.List; import java.util.Map; import java.util.Random; import java.util.UUID; import java.util.concurrent.CountDownLatch; import java.util.logging.Level; import java.util.logging.Logger;   public class InsertTest {        private static Logger logger = Logger.getLogger(InsertTest. class .getName());        //驱动程序名       private static final String DB_DRIVER = "com.mysql.cj.jdbc.Driver" ;      //URL指向要访问的数据库名mysql      private static final String DB_URL = "jdbc:mysql://localhost:3306/test?rewriteBatchedStatements=true&useSSL=false&serverTimezone=UTC" ;      //MySQL配置时的用户名      private static final String DB_USERNAME = "root" ;      //MySQL配置时的密码      private static final String DB_PASSWORD = "…………" ;        private static Random random = new Random( 10000 );      //我们要测试的表的名称      private static final String TABLE_NAME = "student" ;      private int batchSize; //一批提交的事务数      private int concurrent; //      private int sampling; //        public static void main(String[] args) throws Exception {          printHeader();            int [] concurrentList = new int []{ 1 , 5 , 10 , 20 }; //默认测试1，5，10，20个并发          int [] batchSizeList = new int [] { 100 , 200 , 500 , 1000 }; //一批提交的事务数          for ( int concurrent : concurrentList) {              for ( int batchSize : batchSizeList) {                  //对以上每种组合都run一次                  new InsertTest(batchSize, concurrent).run( true );              }              Thread.sleep( 10000 );          }      }     /*-----------InsertTest类的构造函数一-------------*/      public InsertTest( final int batchSize, final int concurrent) throws Exception {          this .batchSize = batchSize;          this .concurrent = concurrent;          this .sampling = 100 ;      }      /*-----------InsertTest类的构造函数二-------------*/      public InsertTest( final int batchSize, final int concurrent, final int sampling) throws Exception {          this .batchSize = batchSize;          this .concurrent = concurrent;          this .sampling = sampling;      }           /*-----------开始运行run方法-------------*/      public void run( boolean printResult) throws Exception {          final List<Long> results = Collections.synchronizedList( new ArrayList<Long>());          final CountDownLatch startGate = new CountDownLatch(concurrent);          final CountDownLatch endGate = new CountDownLatch(concurrent);            for ( int idxConcurrent = 0 ; idxConcurrent < concurrent; idxConcurrent++) {              new Thread( new Runnable() {                  public void run() {                      startGate.countDown();                      try {                          long time = execute();                          long avg = batchSize * sampling * 1000 / time;;                          results.add(Long.valueOf(avg));                      } catch (Exception ex) {                          ex.printStackTrace();                      } finally {                          endGate.countDown();                      }                  }              }).start();          }          endGate.await();            Collections.sort(results);          //每种组合跑完之后都打印出一行数据          if (printResult) {              printResult(batchSize, concurrent, results);          }      }        public long execute() throws Exception {          Connection conn = getConnection();          Map<String, Integer> columns = queryTableColumns(conn);          String insertSQL = generateInsertSQL(columns);          PreparedStatement ps = conn.prepareStatement(insertSQL);          try {              long start = System.currentTimeMillis();              for ( int i = 0 ; i < sampling; i++) {                  execute(conn, ps, columns);              }              long stop = System.currentTimeMillis();              return stop - start;          } catch (Exception ex) {              logger.log(Level.SEVERE, null , ex);              conn.rollback();              conn.close();              throw ex;          } finally {              conn.close();          }      }      //执行插入语句出错。  ps：INSERT INTO student1(name,goal)VALUES(** NOT SPECIFIED **,** NOT SPECIFIED **)      public void execute(Connection conn, PreparedStatement ps, Map<String, Integer> columns) throws Exception {          try {              for ( int idx = 0 ; idx < batchSize; idx++) {                  int idxColumn = 1 ;                  //这个地方实际上是对每一列进行循环。（1）如果该列是key对应的列………… （2）该列为普通列                  for (String column : columns.keySet()) {                      //如果该列为name列即key对应的列，就单独为他生成一个主键。                      //为了执行忽略大小写的比较，使用equalsIgnoreCase                      if (column.equalsIgnoreCase( "name" )) {                          //给JDBC的SQL语句的占位符赋值的,即是下面的“？   connection.prepareStatement("insert into t_user values (?,?)");                          //UUID.randomUUID().toString()是java JDK提供的一个自动生成主键的方法。                          ps.setObject(idxColumn, UUID.randomUUID().toString());                      }                      //否则就是普通列，随便填充点东西进去就好了。                      else {                          ps.setObject(idxColumn, generateColumnValue(columns.get(column)));                      }                      idxColumn ++;                  }                  ps.addBatch();              }              //批量执行SQL语句              ps.executeBatch();              conn.commit();                ps.clearBatch();          }          //如果上面出错了就捕获其异常          catch (SQLException ex) {              logger.log(Level.SEVERE, null , ex);              if ( null != ex.getNextException()) {                  logger.log(Level.SEVERE, null , ex.getNextException());              }              conn.rollback();              throw ex;          }      }      //根据获取的列信息，生成插入的sql语句。      private String generateInsertSQL(Map<String, Integer> columns) throws SQLException {          StringBuilder sb = new StringBuilder();          StringBuffer sbColumns = new StringBuffer();          StringBuffer sbValues = new StringBuffer();            sb.append( "INSERT INTO " ).append(TABLE_NAME);            for (String column : columns.keySet()) {              if (sbColumns.length() > 0 ) {                  sbColumns.append( "," );                  sbValues.append( "," );              }              sbColumns.append(column);              sbValues.append( "?" );          }          sb.append( "(" ).append(sbColumns).append( ")" );          sb.append( "VALUES" );          sb.append( "(" ).append(sbValues).append( ")" );          return sb.toString();      }        private Map<String, Integer> queryTableColumns(Connection conn) throws Exception {          Map<String, Integer> columns = new LinkedHashMap<String, Integer>();          String sql = "SELECT * FROM " + TABLE_NAME + " WHERE 1=0" ;          Statement stmt = conn.createStatement();          ResultSet rs = stmt.executeQuery(sql);          ResultSetMetaData rsmd = rs.getMetaData();          for ( int i = 1 ; i <= rsmd.getColumnCount(); i++) {              columns.put(rsmd.getColumnName(i), rsmd.getColumnType(i));          }          return columns;      }           //生成列值      private Object generateColumnValue( int type) {          Object obj = null ;          switch (type) {              case Types.DECIMAL:              case Types.NUMERIC:              case Types.DOUBLE:              case Types.FLOAT:              case Types.REAL:              case Types.BIGINT:              case Types.TINYINT:              case Types.SMALLINT:              case Types.INTEGER:                  obj = random.nextInt( 10000 );                  break ;              case Types.DATE:                  obj = Calendar.getInstance().getTime();                  break ;              case Types.TIMESTAMP:                  obj = new Timestamp(System.currentTimeMillis());                  break ;              default :                  obj = String.valueOf(random.nextInt( 10000 ));                  break ;          }          return obj;      }      //连接MYSQL数据库。      private Connection getConnection() throws Exception {          Class.forName(DB_DRIVER);          Connection conn = DriverManager.getConnection(DB_URL, DB_USERNAME, DB_PASSWORD);          conn.setAutoCommit( false );          return conn;      }      //打印出表头（即列的信息）      private static void printHeader() {          StringBuilder sb = new StringBuilder();          sb.append( "\n" );          sb.append( new Formatter().format( "%15s|%15s|%15s|%15s|%15s" , "BATCH_SIZE" , "CONCURRENT" , "AVG (r/s)" , "MIN (r/s)" , "MAX (r/s)" ));          System.out.println(sb.toString());      }      //打印每次跑完后的统计信息      private static void printResult( int batch, int concurrent, List<Long> results) {          Long total = Long.valueOf( 0 );          for (Long result : results) {              total += result;          }          StringBuilder sb = new StringBuilder();          sb.append( new Formatter().format( "%15s|%15s|%15s|%15s|%15s" , batch, concurrent, (total/results.size()), results.get( 0 ), results.get(results.size() - 1 )));          System.out.println(sb.toString());      } }

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原文链接：https://blog.csdn.net/mijichui2153/article/details/81434816