關于他的選項手冊上以及--help介紹的很詳細。
我解釋一下一些常用的選項。
這里要注意的幾個選項：
--concurrency代表并發數量，多個可以用逗號隔開，當然你也可以用自己的分隔符隔開，這個時候要用到--delimiter開關。--engines代表要測試的引擎，可以有多個，用分隔符隔開。--iterations代表要運行這些測試多少次。--auto-generate-sql 代表用系統自己生成的SQL腳本來測試。--auto-generate-sql-load-type 代表要測試的是讀還是寫還是兩者混合的（read,write,update,mixed）--number-of-queries 代表總共要運行多少次查詢。每個客戶運行的查詢數量可以用查詢總數/并發數來計算。比如倒數第二個結果2=200/100。--debug-info 代表要額外輸出CPU以及內存的相關信息。--number-int-cols 代表示例表中的INTEGER類型的屬性有幾個。--number-char-cols 意思同上。--create-schema 代表自己定義的模式（在MySQL中也就是庫）。--query 代表自己的SQL腳本。--only-print 如果只想打印看看SQL語句是什么，可以用這個選項。
現在來看一些我測試的例子。
1、用自帶的SQL腳本來測試。
MySQL版本為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
我來解釋一下結果的含義。拿每個引擎最后一個Benchmark示例。對于INNODB引擎，200個客戶端同時運行這些SQL語句平均要花0.192秒。相應的MYISAM為0.092秒。
2、用我們自己定義的SQL 腳本來測試。
這些數據在另外一個MySQL實例上。版本為5.0.45先看一下這兩個表的相關數據。
1）、總記錄數。
mysql> select table_rows as rows from information_schema.tables where table_schema='t_girl' and table_name='article';
+--------+
| rows |
+--------+
| 296693 |
+--------+
1 row in set (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 in set (0.00 sec)
2）、總列數。
mysql> select count(*) as column_total from information_schema.columns where table_schema = 't_girl' and table_name = 'article';
+--------------+
| column_total |
+--------------+
| 32 |
+--------------+
1 row in set (0.01 sec)
mysql> select count(*) as column_total from information_schema.columns where table_schema = 't_girl' and table_name = 'category';
+--------------+
| column_total |
+--------------+
| 9 |
+--------------+
1 row in set (0.01 sec)
3）、調用的存儲過程
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）、我們用mysqlslap來測試
以下得這個例子代表用mysqlslap來測試并發數為25,50,100的調用存儲過程，并且總共調用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
平均每個并發運行200個查詢用了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 結果
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 |
+------+------+--------------------+--------------------+---------+-------+--------------------+------------------------------------------------------------------------------------------------------+
55 rows in set (0.00 sec)
上面的測試語句其實也可以這樣寫
[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
小總結一下。mysqlslap對于模擬多個用戶同時對MySQL發起“進攻”提供了方便。同時詳細的提供了“高負荷攻擊MySQL”的詳細數據報告。而且如果你想對于多個引擎的性能。這個工具再好不過了。
文章來源于領測軟件測試網 http://www.kjueaiud.com/
