Oracle 大最插入数据 一段时间之后变慢问题解决方法

　　因为系统业务需要，需要从数据中心导入12年的历史数据到系统。每天平均1000千左右。有一个表有200多个字段，基中还包括几个clob字段。导入方式是用http向服务器一天一天的请求数据。每次请求一天。不能请求太多天，因为服务器请求太多天，有可能返回不了数据。导致失败，Java的JDBC接口写入。每次写数据都是一条一条的写入。刚开始还算顺利，接口过来的数据都能写入进数据库。但问题出现在写入1个月数据左右就开始慢慢的出现卡顿的情况。写入一条记录的数据，有时10几秒，有几几分钟。最坏的时候，就一条数据几个小时还没有写入成功，导致整个同步进程严重拥堵。每次卡死之后，重启数据库服务又可以正常写入。但每次写入一段时候之后，又卡死。

试过以下方法都不见效：

1、停止所有的触发器

2、接收数据表使用nologging表。

3、分次提交，一次不要只提交一条记录。一次提交一天记录。

最后在网上找到了解决方法。也是分次提交，但不是使用executeUpdate()执行，而是使用了先addBatch(), 再executeBatch()的方式。

 

具体见代码中的：    public int executeBatch(String sql, List<Object[]> params) 方法。

附操作数据库的代码

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package bh.ojdbc.util;   import java.sql.CallableStatement; 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.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map;   import org.apache.log4j.Logger;   import bh.getjzdata.Para; import bh.util.SetRW; import bh.util.Tool;    /**  * 对jdbc的完整封装  *  */ public class JDBCUtil {        private static Logger logger = Logger.getLogger(JDBCUtil.class);     private static  String driver = null;     private static  String url = null;     private static  String username = null;     private static  String password = null;           private CallableStatement callableStatement = null;//创建CallableStatement对象          private Connection conn = null;     private PreparedStatement pst = null;     private ResultSet rst = null;       /*  static {            try {                // 加载数据库驱动程序                Class.forName(driver);            } catch (ClassNotFoundException e) {                System.out.println("加载驱动错误");                System.out.println(e.getMessage());            }        } */             public JDBCUtil(){         this.driver = Para.oracle_driver;         this.url = Para.oracle_url;         this.username = Para.oracle_userid;         this.password = Para.oracle_password;           }           public JDBCUtil(String driver,String url ,String username,String password) {         this.driver = driver;         this.url = url;         this.username = username;         this.password = password;     }           /**       * 建立数据库连接       * @return 数据库连接       */        public Connection getConnection() {            try{             if (this.conn!=null && !this.conn.isClosed()){                 return this.conn;             }         }         catch(Exception e){                       }         try {                 // 加载数据库驱动程序                  try {                 Class.forName(driver);             } catch (ClassNotFoundException e) {                 System.out.println("加载驱动错误");                    System.out.println(e.getMessage());                  e.printStackTrace();                 logger.error(Tool.getExceptionDetail(e));             }             // 获取连接                conn = DriverManager.getConnection(url, username,                        password);            } catch (SQLException e) {                System.out.println(e.getMessage());                logger.error(Tool.getExceptionDetail(e));         }            return conn;        }              public int executeUpdate(String sql, Object[] params) {         return executeUpdate(sql,params,true);     }     /**       * insert update delete SQL语句的执行的统一方法       * @param sql SQL语句       * @param params 参数数组，若没有参数则为null       * @return 受影响的行数       */        public int executeUpdate(String sql, Object[] params,boolean isCloseAll) {            // 受影响的行数            int affectedLine = 0;                          try {                // 获得连接                conn = this.getConnection();              if (!isCloseAll && conn.getAutoCommit()){                 conn.setAutoCommit(false);                               }             // 调用SQL                 pst = conn.prepareStatement(sql);                                  // 参数赋值                if (params != null) {                    for (int i = 0; i < params.length; i++) {                        pst.setObject(i + 1, params[i]);                    }                }                /*在此 PreparedStatement 对象中执行 SQL 语句，                                           该语句必须是一个 SQL 数据操作语言（Data Manipulation Language，DML）语句，比如 INSERT、UPDATE 或 DELETE                                           语句；或者是无返回内容的 SQL 语句，比如 DDL 语句。    */             // 执行                affectedLine = pst.executeUpdate();                      } catch (SQLException e) {             if (e.getMessage().indexOf("数据重复")<=0){                 System.out.println(e.getMessage());                    logger.error(Tool.getExceptionDetail(e));                 logger.error(sql);                 if (params != null) {                        for (int i = 0; i < params.length; i++) {                            logger.error(params[i]);                        }                    }             }             try{                 conn.commit();             }             catch(Exception ex){                               }             //closeAll();         } finally {               try{                  pst.close();             }             catch(Exception e){                               }             if (isCloseAll){             // 释放资源                    closeAll();                }         }            return affectedLine;        }                            /**       * insert update delete SQL语句的执行的统一方法       * @param sql SQL语句       * @param params 参数数组，若没有参数则为null       * @return 受影响的行数       */        public int executeBatch(String sql, List<Object[]> params) {            // 受影响的行数            int affectedLine = 0;                          try {                // 获得连接                conn = this.getConnection();              conn.setAutoCommit(false);             // 调用SQL                 pst = conn.prepareStatement(sql);                                  // 参数赋值                if (params != null) {                 for (int i = 0; i < params.size(); i++) {                        Object[] objs = params.get(i);                     for (int j = 0; j < objs.length; j++) {                            pst.setObject(j + 1, objs[j]);                        }                     pst.addBatch();                 }                }                /*在此 PreparedStatement 对象中执行 SQL 语句，                                           该语句必须是一个 SQL 数据操作语言（Data Manipulation Language，DML）语句，比如 INSERT、UPDATE 或 DELETE                                           语句；或者是无返回内容的 SQL 语句，比如 DDL 语句。    */             // 执行                pst.executeBatch();                      } catch (SQLException e) {             //如果出现异常。重新执行单个插入。             try{                 conn.rollback();             }             catch(Exception ex){                               }             if (params != null) {                 for (int i = 0; i < params.size(); i++) {                        this.executeUpdate(sql, params.get(i), false);                }                }                         } finally {               try{                  pst.close();             }             catch(Exception e){                               }             closeAll();         }            return affectedLine;        }              /**       * SQL 查询将查询结果直接放入ResultSet中       * @param sql SQL语句       * @param params 参数数组，若没有参数则为null       * @return 结果集       */        private ResultSet executeQueryRS(String sql, Object[] params) {            try {                // 获得连接                conn = this.getConnection();                                  // 调用SQL                pst = conn.prepareStatement(sql);                                  // 参数赋值                if (params != null) {                    for (int i = 0; i < params.length; i++) {                        pst.setObject(i + 1, params[i]);                    }                }                                  // 执行                rst = pst.executeQuery();                  } catch (SQLException e) {                System.out.println(e.getMessage());                logger.error(Tool.getExceptionDetail(e));         }                   return rst;        }                  /**       * SQL 查询将查询结果：一行一列       * @param sql SQL语句       * @param params 参数数组，若没有参数则为null       * @return 结果集       */        public Object executeQuerySingle(String sql, Object[] params) {            Object object = null;            try {                // 获得连接                conn = this.getConnection();                                  // 调用SQL                pst = conn.prepareStatement(sql);                                  // 参数赋值                if (params != null) {                    for (int i = 0; i < params.length; i++) {                        pst.setObject(i + 1, params[i]);                    }                }                                  // 执行                rst = pst.executeQuery();                      if(rst.next()) {                    object = rst.getObject(1);                }                              } catch (SQLException e) {                System.out.println(e.getMessage());             logger.error(Tool.getExceptionDetail(e));                       } finally {                closeAll();            }                  return object;        }              /**       * 获取结果集，并将结果放在List中       *        * @param sql  SQL语句       *         params  参数，没有则为null        * @return List       *                       结果集       */        public List<Object> excuteQuery(String sql, Object[] params) {            // 执行SQL获得结果集            ResultSet rs = executeQueryRS(sql, params);                          // 创建ResultSetMetaData对象            ResultSetMetaData rsmd = null;                          // 结果集列数            int columnCount = 0;            try {                rsmd = rs.getMetaData();                                  // 获得结果集列数                columnCount = rsmd.getColumnCount();            } catch (SQLException e1) {                System.out.println(e1.getMessage());                logger.error(Tool.getExceptionDetail(e1));         }                  // 创建List            List<Object> list = new ArrayList<Object>();                  try {                // 将ResultSet的结果保存到List中                while (rs.next()) {                    Map<String, Object> map = new HashMap<String, Object>();                    for (int i = 1; i <= columnCount; i++) {                        map.put(rsmd.getColumnLabel(i), rs.getObject(i));                    }                    list.add(map);//每一个map代表一条记录，把所有记录存在list中                }            } catch (SQLException e) {                System.out.println(e.getMessage());               logger.error(Tool.getExceptionDetail(e));         } finally {                // 关闭所有资源                closeAll();            }                  return list;        }                  /**       * 存储过程带有一个输出参数的方法       * @param sql 存储过程语句       * @param params 参数数组       * @param outParamPos 输出参数位置       * @param SqlType 输出参数类型       * @return 输出参数的值       */        public Object excuteQuery(String sql, Object[] params,int outParamPos, int SqlType) {            Object object = null;            conn = this.getConnection();            try {                // 调用存储过程                // prepareCall:创建一个 CallableStatement 对象来调用数据库存储过程。             callableStatement = conn.prepareCall(sql);                                  // 给参数赋值                if(params != null) {                    for(int i = 0; i < params.length; i++) {                        callableStatement.setObject(i + 1, params[i]);                    }                }                                  // 注册输出参数                callableStatement.registerOutParameter(outParamPos, SqlType);                                  // 执行                callableStatement.execute();                                  // 得到输出参数                object = callableStatement.getObject(outParamPos);                              } catch (SQLException e) {                System.out.println(e.getMessage());                logger.error(Tool.getExceptionDetail(e));         } finally {                // 释放资源                closeAll();            }                          return object;        }              /**       * 关闭所有资源       */        public  void closeAll() {            // 关闭结果集对象            if (rst != null) {                try {                   if (!rst.isClosed()){                     rst.close();                    }             } catch (SQLException e) {                    System.out.println(e.getMessage());                }            }                  // 关闭PreparedStatement对象            if (pst != null) {                try {                    if (!pst.isClosed()){                     pst.close();                    }             } catch (SQLException e) {                    System.out.println(e.getMessage());                 logger.error(Tool.getExceptionDetail(e));             }            }                          // 关闭CallableStatement 对象            if (callableStatement != null) {                try {                    callableStatement.close();                } catch (SQLException e) {                    System.out.println(e.getMessage());                    logger.error(Tool.getExceptionDetail(e));             }            }                  // 关闭Connection 对象            if (conn != null) {                try {                    if(!conn.getAutoCommit()&&!conn.isClosed()){                     conn.commit();                 }                 if(!conn.isClosed()){                     conn.close();                 }             } catch (SQLException e) {                    System.out.println(e.getMessage());                   logger.error(Tool.getExceptionDetail(e));             }            }           }    }