用mysqlslap对MySQL进行压力测试

MySQL5.1地的确提供了好多有力的工具来帮助我们DBA进行数据库管理。
现在看一下这个压力测试工具mysqlslap.
关于他的选项手册上以及–help介绍的很详细。

我解释一下一些常用的选项。
这里要注意的几个选项:
–concurrency代表并发数量,多个可以用逗号隔开,当然你也可以用自己的分隔符隔开,这个时候要用到–delimiter开关。
–engines代表要测试的引擎,可以有多个,用分隔符隔开。
–iterations代表要运行这些测试多少次。
–auto-generate-sql 代表用系统自己生成的SQL脚本来测试。
–auto-generate-sql-load-type 代表要测试的是读还是写还是两者混合的(read,write,update,mixed)
–number-of-queries 代表总共要运行多少次查询。每个客户运行的查询数量可以用查询总数/并发数来计算。比如倒数第二个结果2=200/100。
–debug-info 代表要额外输出CPU以及内存的相关信息。
–number-int-cols 代表示例表中的INTEGER类型的属性有几个。
–number-char-cols 意思同上。
–create-schema 代表自己定义的模式(在MySQL中也就是库)。
–query 代表自己的SQL脚本。
–only-print 如果只想打印看看SQL语句是什么,可以用这个选项。

现在来看一些我测试的例子。

1、用自带的SQL脚本来测试。
MySQL版本为5.1.23
[root@localhost ~]# mysqlslap --defaults-file=/usr/local/mysql-maria/my.cnf --concurrency=50,100,200 --iterations=1 --number-int-cols=4 --number-char-cols=35 --auto-generate-sql --auto-generate-sql-add-autoincrement --auto-generate-sql-load-type=mixed --engine=myisam,innodb --number-of-queries=200 --debug-info -uroot -p1 -S/tmp/mysql_3310.sock

Benchmark
Running for engine myisam
Average number of seconds to run all queries: 0.063 seconds
Minimum number of seconds to run all queries: 0.063 seconds
Maximum number of seconds to run all queries: 0.063 seconds
Number of clients running queries: 50
Average number of queries per client: 4

Benchmark
Running for engine myisam
Average number of seconds to run all queries: 0.070 seconds
Minimum number of seconds to run all queries: 0.070 seconds
Maximum number of seconds to run all queries: 0.070 seconds
Number of clients running queries: 100
Average number of queries per client: 2

Benchmark
Running for engine myisam
Average number of seconds to run all queries: 0.092 seconds
Minimum number of seconds to run all queries: 0.092 seconds
Maximum number of seconds to run all queries: 0.092 seconds
Number of clients running queries: 200
Average number of queries per client: 1

Benchmark
Running for engine innodb
Average number of seconds to run all queries: 0.115 seconds
Minimum number of seconds to run all queries: 0.115 seconds
Maximum number of seconds to run all queries: 0.115 seconds
Number of clients running queries: 50
Average number of queries per client: 4

Benchmark
Running for engine innodb
Average number of seconds to run all queries: 0.134 seconds
Minimum number of seconds to run all queries: 0.134 seconds
Maximum number of seconds to run all queries: 0.134 seconds
Number of clients running queries: 100
Average number of queries per client: 2

Benchmark
Running for engine innodb
Average number of seconds to run all queries: 0.192 seconds
Minimum number of seconds to run all queries: 0.192 seconds
Maximum number of seconds to run all queries: 0.192 seconds
Number of clients running queries: 200
Average number of queries per client: 1

User time 0.06, System time 0.15
Maximum resident set size 0, Integral resident set size 0
Non-physical pagefaults 5803, Physical pagefaults 0, Swaps 0
Blocks in 0 out 0, Messages in 0 out 0, Signals 0
Voluntary context switches 8173, Involuntary context switches 528

我来解释一下结果的含义。
拿每个引擎最后一个Benchmark示例。
对于INNODB引擎,200个客户端同时运行这些SQL语句平均要花0.192秒。相应的MYISAM为0.092秒。

2、用我们自己定义的SQL 脚本来测试。
这些数据在另外一个MySQL实例上。版本为5.0.45
先看一下这两个表的相关数据。
1)、总记录数。

mysql>select table_rows as rows from information_schema.tables where table_schema='t_girl'and table_name='article'; 
+--------+ 
| rows   | 
+--------+ 
| 296693 | 
+--------+ 
1 row inset(0.01 sec) 
 
mysql>select table_rows as rows from information_schema.tables where table_schema='t_girl'and table_name='category'; 
+------+ 
| rows | 
+------+ 
| 113  | 
+------+ 
1 row inset(0.00 sec) 

2)、总列数。

mysql>select count(*)as column_total from information_schema.columns where table_schema ='t_girl'and table_name ='article'; 
+--------------+ 
| column_total | 
+--------------+ 
| 32           | 
+--------------+ 
1 row inset(0.01 sec) 
 
mysql>selectcount(*)as column_total from information_schema.columns where table_schema ='t_girl'and table_name ='category'; 
+--------------+ 
| column_total | 
+--------------+ 
| 9            | 
+--------------+ 
1 row inset(0.01 sec) 

3)、调用的存储过程

DELIMITER $$ 
 
DROP PROCEDURE IF EXISTS `t_girl`.`sp_get_article`$$ 
 
CREATE DEFINER=`root`@`%` PROCEDURE `sp_get_article`(IN f_category_id int, 
 IN f_page_size int,IN f_page_no int 
) 
BEGIN 
  set@stmt='select a.* from article as a inner join '; 
  set@stmt=concat(@stmt,'(select a.aid from article as a '); 
  if f_category_id != 0 then 
    set@stmt=concat(@stmt,' inner join (select cid from category where cid = ',f_category_id,' or parent_id = ',f_category_id,') as b on a.category_id = b.cid'); 
  end if; 
  if f_page_size >0 && f_page_no > 0 then 
    set@stmt=concat(@stmt,' limit ',(f_page_no-1)*f_page_size,',',f_page_size); 
  end if; 
  
  set@stmt=concat(@stmt,') as b on (a.aid = b.aid)'); 
  prepare s1 from@stmt; 
  execute s1; 
  deallocate prepare s1; 
  set@stmt=NULL; 
END$$ 
 
DELIMITER ; 

4)、我们用mysqlslap来测试
以下得这个例子代表用mysqlslap来测试并发数为25,50,100的调用存储过程,并且总共调用5000次。
[root@localhost ~]# mysqlslap –defaults-file=/usr/local/mysql-maria/my.cnf –concurrency=25,50,100 –iterations=1 –query=’call t_girl.sp_get_article(2,10,1);’–number-of-queries=5000 –debug-info-uroot -p -S/tmp/mysql50.sock
Enter password:
Benchmark
Average number of seconds to run all queries: 3.507 seconds
Minimum number of seconds to run all queries: 3.507 seconds
Maximum number of seconds to run all queries: 3.507 seconds
Number of clients running queries: 25
Average number of queries per client: 200
平均每个并发运行200个查询用了3.507秒。
Benchmark
Average number of seconds to run all queries: 3.742 seconds
Minimum number of seconds to run all queries: 3.742 seconds
Maximum number of seconds to run all queries: 3.742 seconds
Number of clients running queries: 50
Average number of queries per client: 100

Benchmark
Average number of seconds to run all queries: 3.697 seconds
Minimum number of seconds to run all queries: 3.697 seconds
Maximum number of seconds to run all queries: 3.697 seconds
Number of clients running queries: 100
Average number of queries per client: 50

User time 0.87, System time 0.33
Maximum resident set size 0, Integral resident set size 0
Non-physical pagefaults 1877, Physical pagefaults 0, Swaps 0
Blocks in 0 out 0, Messages in 0 out 0, Signals 0
Voluntary context switches 27218, Involuntary context switches 3100

看一下SHOW PROCESSLIST 结果

mysql> show processlist; 
+------+------+--------------------+--------------------+---------+-------+--------------------+------------------------------------------------------------------------------------------------------+ 
| Id   | User | Host               | db                 | Command | Time  | State              | Info                                                                                                 | 
+------+------+--------------------+--------------------+---------+-------+--------------------+------------------------------------------------------------------------------------------------------+ 
………… 
| 3177 | root | %                  | t_girl             | Query   |     0 | NULL               | select a.* from article as a inner join (select a.aid from article as a  inner join (select cid from | 
| 3178 | root | %                  | t_girl             | Query   |     0 | NULL               | select a.* from article as a inner join (select a.aid from article as a  inner join (select cid from | 
| 3179 | root | %                  | t_girl             | Query   |     0 | NULL               | select a.* from article as a inner join (select a.aid from article as a  inner join (select cid from | 
| 3181 | root | %                  | t_girl             | Query   |     0 | NULL               | select a.* from article as a inner join (select a.aid from article as a  inner join (select cid from | 
| 3180 | root | %                  | t_girl             | Query   |     0 | NULL               | select a.* from article as a inner join (select a.aid from article as a  inner join (select cid from | 
| 3182 | root | %                  | t_girl             | Query   |     0 | NULL               | select a.* from article as a inner join (select a.aid from article as a  inner join (select cid from | 
| 3183 | root | %                  | t_girl             | Query   |     0 | NULL               | select a.* from article as a inner join (select a.aid from article as a  inner join (select cid from | 
| 3187 | root | %                  | t_girl             | Query   |     0 | removing tmp table | select a.* from article as a inner join (select a.aid from article as a  inner join (select cid from | 
| 3186 | root | %                  | t_girl             | Query   |     0 | NULL               | select a.* from article as a inner join (select a.aid from article as a  inner join (select cid from | 
| 3194 | root | %                  | t_girl             | Query   |     0 | NULL               | select a.* from article as a inner join (select a.aid from article as a  inner join (select cid from | 
| 3203 | root | %                  | t_girl             | Query   |     0 | NULL               | deallocate prepare s1                                                                                | 
………… 
| 3221 | root | %                  | t_girl             | Query   |     0 | NULL               | select a.* from article as a inner join (select a.aid from article as a  inner join (select cid from | 
| 3222 | root | %                  | t_girl             | Query   |     0 | NULL               | select a.* from article as a inner join (select a.aid from article as a  inner join (select cid from | 
| 3223 | root | %                  | t_girl             | Query   |     0 | NULL               | select a.* from article as a inner join (select a.aid from article as a  inner join (select cid from | 
| 3224 | root | %                  | t_girl             | Query   |     0 | removing tmp table | select a.* from article as a inner join (select a.aid from article as a  inner join (select cid from | 
| 3225 | root | %                  | t_girl             | Query   |     0 | NULL               | select a.* from article as a inner join (select a.aid from article as a  inner join (select cid from | 
| 3226 | root | %                  | t_girl             | Query   |     0 | NULL               | select a.* from article as a inner join (select a.aid from article as a  inner join (select cid from | 
+------+------+--------------------+--------------------+---------+-------+--------------------+------------------------------------------------------------------------------------------------------+ 
rows in set (0.00 sec) 

上面的测试语句其实也可以这样写
[root@localhost ~]# mysqlslap --defaults-file=/usr/local/mysql-maria/my.cnf --concurrency=25,50,100 --iterations=1 --create-schema='t_girl'--query='call sp_get_article(2,10,1);'--number-of-queries=5000 --debug-info -uroot -p -S/tmp/mysql50.sock

小总结一下。
mysqlslap对于模拟多个用户同时对MySQL发起“进攻”提供了方便。同时详细的提供了“高负荷攻击MySQL”的详细数据报告。
而且如果你想对于多个引擎的性能。这个工具再好不过了。

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