mysql 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语句是什么源码天空，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
de> [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 de>
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。
de> mysql>selecttable_rowsasrowsfrominformation_schema.tableswheretable_schema='t_girl'andtable_name='article';
+--------+
|rows |
+--------+
|296693|
+--------+
1 rowinset(0.01 sec)
mysql>selecttable_rowsasrowsfrominformation_schema.tableswheretable_schema='t_girl'andtable_name='category';
+------+
|rows|
+------+
|113 |
+------+
1 rowinset(0.00 sec)
de>
2）、总列数。
de> mysql>selectcount(*)ascolumn_totalfrominformation_schema.columnswheretable_schema='t_girl'andtable_name='article';
+--------------+
|column_total|
+--------------+
|32 |
+--------------+
1 rowinset(0.01 sec)
mysql>selectcount(*)ascolumn_totalfrominformation_schema.columnswheretable_schema='t_girl'andtable_name='category';
+--------------+
|column_total|
+--------------+
|9 |
+--------------+
1 rowinset(0.01 sec)
de>
3）、调用的存储过程
de> DELIMITER $$
DROPPROCEDURE IF EXISTS`t_girl`.`sp_get_article`$$
CREATEDEFINER=`root`@`%`PROCEDURE`sp_get_article`(INf_category_idint,
INf_page_sizeint,INf_page_noint
)
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!=0then
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');
endif;
if f_page_size>0&&f_page_no>0then
set@stmt=concat(@stmt,' limit ',(f_page_no-1)*f_page_size,',',f_page_size);
endif;
set@stmt=concat(@stmt,') as b on (a.aid = b.aid)');
prepare s1from@stmt;
execute s1;
deallocate prepare s1;
set@stmt=NULL;
END$$
DELIMITER; de>
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。
de> [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 de>
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 |
+------+------+--------------------+--------------------+---------+-------+--------------------+------------------------------------------------------------------------------------------------------+
55 rows in set (0.00 sec)
上面的测试语句其实也可以这样写
de> [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 de>
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