Mysql创建测试大量测试数据

修改mysql配置

max_heap_table_size=4000M
innodb_flush_log_at_trx_commit=0
sync_binlog=500

创建测试数据库

 create database test_db charset=utf8;
 use test_db;

创建数据表

CREATE TABLE `test_innodb` (
    `id` INT (11) NOT NULL AUTO_INCREMENT,
    `user_id` VARCHAR (20) NOT NULL,
    `group_id` INT (11) NOT NULL,
    `create_time` datetime NOT NULL,
    PRIMARY KEY (`id`),
    KEY `index_user_id` (`user_id`) USING HASH
) ENGINE = INNODB AUTO_INCREMENT = 1 DEFAULT CHARSET = utf8;

创建随机字符串函数

delimiter $$
CREATE FUNCTION rand_string(n int) RETURNS varchar(255)
begin
  declare chars_str varchar(100)
  default "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
  declare return_str varchar(255) default "";
  declare i int default 0;
  while i < n do
      set return_str=concat(return_str,substring(chars_str,floor(1+rand()*62),1));
      set i= i+1;
  end while;
  return return_str;
end $$
delimiter ;

创建存储过程

delimiter $$
CREATE  PROCEDURE `insert_data`(IN n int)
BEGIN
  DECLARE i INT DEFAULT 1;
    WHILE (i <= n ) DO
      INSERT into test_innodb (user_id,group_id,create_time ) VALUEs (rand_string(20),FLOOR(RAND() * 100) ,now() );
            set i=i+1;
    END WHILE;
END $$
delimiter ;

调用存储过程, 插入数据

set @d=now();
call insert_data(1000000);
select timestampdiff(second,@d,now());

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

测试ON DUPLICATE KEY UPDATE

delimiter $$
CREATE  PROCEDURE `insert_update2_data`(IN n int)
BEGIN
  DECLARE i INT DEFAULT ;
    WHILE (i <= n ) DO
      INSERT into test_innodb (id,user_id,group_id,create_time ) VALUES (FLOOR(RAND() * ),CONCAT('a#',rand_string()),FLOOR(RAND() * ) ,now() )     ON DUPLICATE KEY UPDATE  user_id=CONCAT('u#',rand_string()), group_id=FLOOR(RAND() * ),create_time=now() ;
            set i=i+;
    END WHILE;
END $$
delimiter ;

INSERT into test_innodb (id,user_id,group_id,create_time ) VALUES (FLOOR(RAND() * ),CONCAT('a#',rand_string()),FLOOR(RAND() * ) ,now() )
ON DUPLICATE KEY UPDATE  user_id=CONCAT('u#',rand_string()), group_id=FLOOR(RAND() * ),create_time=now() ;

INSERT into test_innodb (id,user_id,group_id,create_time ) VALUES (,CONCAT('a#',rand_string()),FLOOR(RAND() * ) ,now())
INSERT into test_innodb (id,user_id,group_id,create_time ) VALUES (,CONCAT('a#',rand_string()),FLOOR(RAND() * ) ,now());

select now();
set @d=now();
call insert_update2_data();
select timestampdiff(second,@d,now());
select now();

SELECT * FROM test_innodb T WHERE T.user_id like '_#%';