用mysqlslap压测mysql

参考文献：http://my.oschina.net/costaxu/blog/108568

上面网友详细的列举了用mysqlslap对mysql的压力测试结果，我也照葫芦画瓢试了一次，结果如下：

以下命令代表：用10个并发连接，对一个有10个int列，10个varchar列，两个索引的表进行写操作

mysqlslap   --concurrency= --iterations=  --number-int-cols=  --number-char-cols= -a --auto-generate-sql-add-autoincrement --number-of-queries=  --auto-generate-sql-load-type=write -auto-generate-sql-secondary-indexex=  --engine=myisam,innodb -h10.210.214. -P3306 -uroot -proot --debug-info

结果：

Benchmark
        Running for engine myisam
        Average number of seconds to run all queries: 0.694 seconds
        Minimum number of seconds to run all queries: 0.694 seconds
        Maximum number of seconds to run all queries: 0.694 seconds
        Number of clients running queries:
        Average number of queries per client: 

Benchmark
        Running for engine innodb
        Average number of seconds to run all queries: 3.446 seconds
        Minimum number of seconds to run all queries: 3.446 seconds
        Maximum number of seconds to run all queries: 3.446 seconds
        Number of clients running queries:
        Average number of queries per client: 

TPS:

myisam=7205

innodb=1451

通过改变参数--concurrency=50和--concurrency=100来更改并发数，分别试验两次，结果如下：

mysqlslap   --concurrency= --iterations=  --number-int-cols=  --number-char-cols= -a --auto-generate-sql-add-autoincrement --number-of-queries=  --auto-generate-sql-load-type=write -auto-generate-sql-secondary-indexex=  --engine=myisam,innodb -h10.210.214. -P3306 -uroot -proot --debug-info

Benchmark
        Running for engine myisam
        Average number of seconds to run all queries: 8.991 seconds
        Minimum number of seconds to run all queries: 8.991 seconds
        Maximum number of seconds to run all queries: 8.991 seconds
        Number of clients running queries:
        Average number of queries per client: 

Benchmark
        Running for engine innodb
        Average number of seconds to run all queries: 46.858 seconds
        Minimum number of seconds to run all queries: 46.858 seconds
        Maximum number of seconds to run all queries: 46.858 seconds
        Number of clients running queries:
        Average number of queries per client:
Benchmark
        Running for engine myisam
        Average number of seconds to run all queries: 9.687 seconds
        Minimum number of seconds to run all queries: 9.687 seconds
        Maximum number of seconds to run all queries: 9.687 seconds
        Number of clients running queries:
        Average number of queries per client: 

Benchmark
        Running for engine innodb
        Average number of seconds to run all queries: 57.171 seconds
        Minimum number of seconds to run all queries: 57.171 seconds
        Maximum number of seconds to run all queries: 57.171 seconds
        Number of clients running queries:
        Average number of queries per client: 

mysqlslap   --concurrency= --iterations=  --number-int-cols=  --number-char-cols= -a --auto-generate-sql-add-autoincrement --number-of-queries=  --auto-generate-sql-load-type=write -auto-generate-sql-secondary-indexex=  --engine=myisam,innodb -h10.210.214. -P3306 -uroot -proot --debug-info

Benchmark
        Running for engine myisam
        Average number of seconds to run all queries: 7.060 seconds
        Minimum number of seconds to run all queries: 7.060 seconds
        Maximum number of seconds to run all queries: 7.060 seconds
        Number of clients running queries:
        Average number of queries per client: 

Benchmark
        Running for engine innodb
        Average number of seconds to run all queries: 44.711 seconds
        Minimum number of seconds to run all queries: 44.711 seconds
        Maximum number of seconds to run all queries: 44.711 seconds
        Number of clients running queries:
        Average number of queries per client:
Benchmark
        Running for engine myisam
        Average number of seconds to run all queries: 6.730 seconds
        Minimum number of seconds to run all queries: 6.730 seconds
        Maximum number of seconds to run all queries: 6.730 seconds
        Number of clients running queries:
        Average number of queries per client: 

Benchmark
        Running for engine innodb
        Average number of seconds to run all queries: 39.591 seconds
        Minimum number of seconds to run all queries: 39.591 seconds
        Maximum number of seconds to run all queries: 39.591 seconds
        Number of clients running queries:
        Average number of queries per client: 

并发50 myisam   TPS= 5354

并发50 innodb    TPS= 961

并发100 myisam TPS= 7252

并发100 innodb  TPS= 1186

下面又测试了读的性能：

mysqlslap   --concurrency= --iterations=  --number-int-cols=  --number-char-cols= -a --auto-generate-sql-add-autoincrement --auto-generate-sql-unique-query-number=  --auto-generate-sql-load-type=key --number-of-queries=  --engine=myisam,innodb -h10.210.214. -P3306 -uroot -proot --debug-info

Benchmark
        Running for engine myisam
        Average number of seconds to run all queries: 4.172 seconds
        Minimum number of seconds to run all queries: 4.071 seconds
        Maximum number of seconds to run all queries: 4.274 seconds
        Number of clients running queries:
        Average number of queries per client: 

Benchmark
        Running for engine innodb
        Average number of seconds to run all queries: 4.094 seconds
        Minimum number of seconds to run all queries: 4.070 seconds
        Maximum number of seconds to run all queries: 4.118 seconds
        Number of clients running queries:
        Average number of queries per client: 

mysqlslap   --concurrency= --iterations=  --number-int-cols=  --number-char-cols= -a --auto-generate-sql-add-autoincrement --auto-generate-sql-unique-query-number=  --auto-generate-sql-load-type=key --number-of-queries=  --engine=myisam,innodb -h10.210.214. -P3306 -uroot -proot --debug-info
Benchmark
        Running for engine myisam
        Average number of seconds to run all queries: 4.212 seconds
        Minimum number of seconds to run all queries: 4.134 seconds
        Maximum number of seconds to run all queries: 4.290 seconds
        Number of clients running queries:
        Average number of queries per client: 

Benchmark
        Running for engine innodb
        Average number of seconds to run all queries: 4.232 seconds
        Minimum number of seconds to run all queries: 4.125 seconds
        Maximum number of seconds to run all queries: 4.339 seconds
        Number of clients running queries:
        Average number of queries per client: 

具体数值不用算了，TPS都在10000+

结论：

myisam和innodb两种引擎下，读时性能差不多，写时myisam比innodb要强很多

另外，读时TPS=10000+，这个结果我压根就不信，完全随机的读硬盘的话，硬盘的IOPS大概也就几百左右，因此10000+的结果原因可能为：

a: 测试表中数据太少，数据基本都被缓存了，直接都是从缓存中读的数据

b:mysqlslap生成的SQL语句不够随机，读时永远都是那么几条数据，肯定就命中缓存了

所以以上结果仅供参考罢了。。。。

参考文献中的作者思路很清晰，但用并发数=2来测试未免有点太小气了，所以他的数值肯定没有什么参考价值了