mysql 压力测试工具
自从mysql5.1 之后就自带有一个压力测试的工具 mysqlslap
mysqlslap可以自动生成测试脚本 ,也可以使用第三方提供的测试脚本。
mysqlslap可以测试的指标
(1).系统的最大并发度
(2).不同存储引擎之间的性能比较
(3).系统同一变量设置为不同值时的性能比较
(4).不同版本之间的性能比较
mysqlslap 的具体使用方法可以直接查看帮助 mysqlslap --help
常用的参数有：
--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。
使用mysqlslap自带脚本压力测试：
[[email protected] ~]# mysqlslap --defaults-file=/usr/my.cnf --concurrency=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=innodb,myisam --number-of-queries=10000 --debug-info -uroot -p
Enter password:
Benchmark
Running for engine innodb
Average number of seconds to run all queries: 17.092 seconds
Minimum number of seconds to run all queries: 17.092 seconds
Maximum number of seconds to run all queries: 17.092 seconds
Number of clients running queries: 100
Average number of queries per client: 100
Benchmark
Running for engine innodb
Average number of seconds to run all queries: 17.373 seconds
Minimum number of seconds to run all queries: 17.373 seconds
Maximum number of seconds to run all queries: 17.373 seconds
Number of clients running queries: 200
Average number of queries per client: 50
Benchmark
Running for engine myisam
Average number of seconds to run all queries: 11.350 seconds
Minimum number of seconds to run all queries: 11.350 seconds
Maximum number of seconds to run all queries: 11.350 seconds
Number of clients running queries: 100
Average number of queries per client: 100
Benchmark
Running for engine myisam
Average number of seconds to run all queries: 13.761 seconds
Minimum number of seconds to run all queries: 13.761 seconds
Maximum number of seconds to run all queries: 13.761 seconds
Number of clients running queries: 200
Average number of queries per client: 50
User time 0.54, System time 0.57
Maximum resident set size 10316, Integral resident set size 0
Non-physical pagefaults 6279, Physical pagefaults 9, Swaps 0
Blocks in 1776 out 0, Messages in 0 out 0, Signals 0
Voluntary context switches 74086, Involuntary context switches 42
输出解释：
Benchmark
Running for engine myisam
Average number of seconds to run all queries: 13.761 seconds
Minimum number of seconds to run all queries: 13.761 seconds
Maximum number of seconds to run all queries: 13.761 seconds
Number of clients running queries: 200
Average number of queries per client: 50
10000个请求,200个线程并发执行,每个线程平均完成50个请求。
使用第三方脚本测试
[[email protected] ~]# mysqlslap --defaults-file=/usr/my.cnf --create-schema=‘test‘ --concurrency=50,100 --iterations=1 --query=‘select * from test.temp01 limit 100 ‘ --number-of-queries=5000 --debug-info -uroot -p
Enter password:
Benchmark
Average number of seconds to run all queries: 6.133 seconds
Minimum number of seconds to run all queries: 6.133 seconds
Maximum number of seconds to run all queries: 6.133 seconds
Number of clients running queries: 50
Average number of queries per client: 100
Benchmark
Average number of seconds to run all queries: 6.238 seconds
Minimum number of seconds to run all queries: 6.238 seconds
Maximum number of seconds to run all queries: 6.238 seconds
Number of clients running queries: 100
Average number of queries per client: 50
User time 1.53, System time 1.46
Maximum resident set size 37512, Integral resident set size 0
Non-physical pagefaults 141862, Physical pagefaults 0, Swaps 0
Blocks in 0 out 0, Messages in 0 out 0, Signals 0
Voluntary context switches 504977, Involuntary context switches 43