mysql 优化,压力测试脚本。
适用人群:想做mysql优化的朋友可以看看,写了一个存储过程来随机生成一个400万条数据的表,然后进行相关优化策略实战。
总共建了三张表,脚本分别如下:
CREATE TABLE dept( /*部门表*/
deptno MEDIUMINT UNSIGNED NOT NULL DEFAULT 0, /*编号*/
dname VARCHAR(20) NOT NULL DEFAULT "", /*名称*/
loc VARCHAR(13) NOT NULL DEFAULT "" /*地点*/
) ENGINE=MyISAM DEFAULT CHARSET=utf8 ;
CREATE TABLE emp
(empno MEDIUMINT UNSIGNED NOT NULL DEFAULT 0, /*编号*/
ename VARCHAR(20) NOT NULL DEFAULT "", /*名字*/
job VARCHAR(9) NOT NULL DEFAULT "",/*工作*/
mgr MEDIUMINT UNSIGNED NOT NULL DEFAULT 0,/*上级编号*/
hiredate DATE NOT NULL,/*入职时间*/
sal DECIMAL(7,2) NOT NULL,/*薪水*/
comm DECIMAL(7,2) NOT NULL,/*红利*/
deptno MEDIUMINT UNSIGNED NOT NULL DEFAULT 0 /*部门编号*/
)ENGINE=MyISAM DEFAULT CHARSET=utf8 ;
CREATE TABLE salgrade
(
grade MEDIUMINT UNSIGNED NOT NULL DEFAULT 0,
losal DECIMAL(17,2) NOT NULL,
hisal DECIMAL(17,2) NOT NULL
)ENGINE=MyISAM DEFAULT CHARSET=utf8;
还提供一些测试数据:
INSERT INTO salgrade VALUES (1,700,1200);
INSERT INTO salgrade VALUES (2,1201,1400);
INSERT INTO salgrade VALUES (3,1401,2000);
INSERT INTO salgrade VALUES (4,2001,3000);
INSERT INTO salgrade VALUES (5,3001,9999);
//先要修改截止标志符
delimiter $$
//执行下面函数
create function rand_string(n INT)
returns varchar(255) #该函数会返回一个字符串
begin
#chars_str定义一个变量 chars_str,类型是 varchar(100),默认值'abcdefghijklmnopqrstuvwxyzABCDEFJHIJKLMNOPQRSTUVWXYZ';
declare chars_str varchar(100) default
'abcdefghijklmnopqrstuvwxyzABCDEFJHIJKLMNOPQRSTUVWXYZ';
declare return_str varchar(255) default '';
declare i int default 0;
while i < n do
set return_str =concat(return_str,substring(chars_str,floor(1+rand()*52),1));
set i = i + 1;
end while;
return return_str;
end $$
//测试函数是否成功
select rand_string(6) from dual$$
//另一个函数
create function rand_num()
returns int(5)
begin
declare i int default 0;
set i =floor(10+rand()*500);
return i;
end $$
create procedure insert_emp(in start int(10),in max_num int(10))
begin
declare i int default 0;
#set autocommit =0 把autocommit设置成0
set autocommit = 0;
repeat
set i = i + 1;
insert into emp values ((start+i) ,rand_string(6),'SALESMAN',0001,curdate(),2000,400,rand_num());
until i = max_num
end repeat;
commit;
end $$
//调用刚刚写好的函数, 1800000条记录,从100001号开始
call insert_emp(100001,4000000);
//等待几分钟就可以了,此时可以看看插入的数据条数
mysql> delimiter ;
mysql> select count(*) from emp;
+----------+
| count(*) |
+----------+
| 4000000 |
+----------+
1 row in set (0.00 sec)
#**************************************************************
# 向dept表中插入记录
delimiter $$
drop procedure insert_dept $$
create procedure insert_dept(in start int(10),in max_num int(10))
begin
declare i int default 0;
set autocommit = 0;
repeat
set i = i + 1;
insert into dept values ((start+i) ,rand_string(10),rand_string(8));
until i = max_num
end repeat;
commit;
end $$
delimiter ;
call insert_dept(100,10);
//出现以下提示就成功啦!
mysql> delimiter $$
mysql> create procedure insert_dept(in start int(10),in max_num int(10))
-> begin
-> declare i int default 0;
-> set autocommit = 0;
-> repeat
-> set i = i + 1;
-> insert into dept values ((start+i) ,rand_string(10),rand_string(8));
-> until i = max_num
-> end repeat;
-> commit;
-> end $$
Query OK, 0 rows affected (0.01 sec)
mysql> delimiter ;
mysql> call insert_dept(100,10);
Query OK, 0 rows affected (0.01 sec)
参考博客地址:www.wustzoujing.github.io
参考mysql标签或分类的博文。