mysqlslap

MySQL从5.1.4版开始带有一个压力测试工具mysqlslap，通过模拟多个并发客户端访问mysql来执行测试，使用起来非常的简单。通过mysqlslap -help可以获得可用的选项，这里列一些主要的参数，更详细的说明参考官方手册。

man mysqlslap 也可以看到有下面一条示例:

mysqlslap --delimiter=";" --create="CREATE TABLE a (b int);INSERT INTO a VALUES (23)" --query="SELECT * FROM a" --concurrency=50 --iterations=200

mysqlslap --help 参数

-a, --auto-generate-sql  自动生成测试表和数据
--auto-generate-sql-load-type=name  测试语句的类型。取值包括：read，key，write，update和mixed(多种混合，默认)。
-C, --compress  如果服务器和客户端支持都压缩，则压缩信息传递
--commit=N  多少条DML后提交一次
--create-schema=name 指定数据库测试，不要和：auto-generate-sql 参数一起使用！
--detach=N  执行N条语句后断开重连
--concurrency  指定并发数
-T, --debug-info  打印内存和CPU的信息
--number-of-queries=1000  指定查询总次数
-i, --iterations=5  重复多次（迭代多次）
-e, --engine=name  指定引擎
--only-print  只输出测试语句而不实际执行
-q, --query=name  使用自定义脚本执行测试，例如可以调用自定义的一个存储过程或者sql语句来执行测试。

压力测试: 分别50、100和500个并发，执行1000次总查询，指定引擎：myisam,innodb

[root@localhost ~]# mysqlslap --auto-generate-sql --concurrency=50,100,500 --number-of-queries=1000 --iterations=5 --debug-info --engine=myisam,innodb -uroot -p
Enter password:
Benchmark
    Running for engine myisam
    Average number of seconds to run all queries: 0.108 seconds
    Minimum number of seconds to run all queries: 0.083 seconds
    Maximum number of seconds to run all queries: 0.119 seconds
    Number of clients running queries: 50
    Average number of queries per client: 20

Benchmark
    Running for engine myisam
    Average number of seconds to run all queries: 0.127 seconds
    Minimum number of seconds to run all queries: 0.094 seconds
    Maximum number of seconds to run all queries: 0.150 seconds
    Number of clients running queries: 100
    Average number of queries per client: 10

Benchmark
    Running for engine myisam
    Average number of seconds to run all queries: 0.182 seconds
    Minimum number of seconds to run all queries: 0.161 seconds
    Maximum number of seconds to run all queries: 0.204 seconds
    Number of clients running queries: 500
    Average number of queries per client: 2

Benchmark
    Running for engine innodb
    Average number of seconds to run all queries: 0.305 seconds
    Minimum number of seconds to run all queries: 0.294 seconds
    Maximum number of seconds to run all queries: 0.322 seconds
    Number of clients running queries: 50
    Average number of queries per client: 20

Benchmark
    Running for engine innodb
    Average number of seconds to run all queries: 0.315 seconds
    Minimum number of seconds to run all queries: 0.304 seconds
    Maximum number of seconds to run all queries: 0.338 seconds
    Number of clients running queries: 100
    Average number of queries per client: 10

Benchmark
    Running for engine innodb
    Average number of seconds to run all queries: 0.515 seconds
    Minimum number of seconds to run all queries: 0.485 seconds
    Maximum number of seconds to run all queries: 0.548 seconds
    Number of clients running queries: 500
    Average number of queries per client: 2


User time 2.48, System time 2.47
Maximum resident set size 27284, Integral resident set size 0
Non-physical pagefaults 55681, Physical pagefaults 0, Swaps 0
Blocks in 0 out 0, Messages in 0 out 0, Signals 0
Voluntary context switches 101688, Involuntary context switches 95927