MySQL自带的性能压力测试工具mysqlslap详解
测试的过程需要生成测试表,插入测试数据,这个mysqlslap可以自动生成,默认生成一个mysqlslap的schema,如果已经存在则先删除。
使用语法如下:
# mysqlslap [options]
常用参数 [options] 详细说明:
--auto-generate-sql, -a 自动生成测试表和数据,表示用mysqlslap工具自己生成的SQL脚本来测试并发压力。
--auto-generate-sql-load-type=type 测试语句的类型。代表要测试的环境是读操作还是写操作还是两者混合的。取值包括:read,key,write,update和mixed(默认)。
--auto-generate-sql-add-auto-increment 代表对生成的表自动添加auto_increment列,从5.1.18版本开始支持。
--number-char-cols=N, -x N 自动生成的测试表中包含多少个字符类型的列,默认1
--number-int-cols=N, -y N 自动生成的测试表中包含多少个数字类型的列,,默认1
--number-of-queries=N 总的测试查询次数(并发客户数×每客户查询次数)
--query=name,-q 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。
--create-schema 代表自定义的测试库名称,测试的schema,MySQL中schema也就是database。
--commint=N 多少条DML后提交一次。
--compress, -C 如果服务器和客户端支持都压缩,则压缩信息传递。
--concurrency=N, -c N 表示并发量,也就是模拟多少个客户端同时执行select。可指定多个值,以逗号或者--delimiter参数指定的值做为分隔符。例如:--concurrency=100,200,500。
--engine=engine_name, -e engine_name 代表要测试的引擎,可以有多个,用分隔符隔开。例如:--engines=myisam,innodb。
--iterations=N, -i N 测试执行的迭代次数,代表要在不同并发环境下,各自运行测试多少次。
--only-print 只打印测试语句而不实际执行。
--detach=N 执行N条语句后断开重连。
--debug-info, -T 打印内存和CPU的相关信息。
说明:
测试的过程需要生成测试表,插入测试数据,这个mysqlslap可以自动生成,默认生成一个mysqlslap的schema,如果已经存在则先删除。可以用--only-print来打印实际的测试过程,整个测试完成后不会在数据库中留下痕迹。
各种测试参数实例(-p后面跟的是mysql的root密码):
单线程测试。测试做了什么。
# mysqlslap -a -uroot -p123456
多线程测试。使用–concurrency来模拟并发连接。
# mysqlslap -a -c 100 -uroot -p123456
迭代测试。用于需要多次执行测试得到平均值。
# mysqlslap -a -i 10 -uroot -p123456
# mysqlslap ---auto-generate-sql-add-autoincrement -a -uroot -p123456
# mysqlslap -a --auto-generate-sql-load-type=read -uroot -p123456
# mysqlslap -a --auto-generate-secondary-indexes=3 -uroot -p123456
# mysqlslap -a --auto-generate-sql-write-number=1000-uroot -p123456
# mysqlslap --create-schema world -q "select count(*) from City" -uroot -p123456
# mysqlslap -a -e innodb -uroot -p123456
# mysqlslap -a --number-of-queries=10 -uroot -p123456
测试同时不同的存储引擎的性能进行对比:
# mysqlslap -a --concurrency=50,100 --number-of-queries 1000 --iterations=5 --engine=myisam,innodb --debug-info -uroot -p123456
执行一次测试,分别50和100个并发,执行1000次总查询:
# mysqlslap -a --concurrency=50,100 --number-of-queries 1000 --debug-info -uroot -p123456
50和100个并发分别得到一次测试结果(Benchmark),并发数越多,执行完所有查询的时间越长。为了准确起见,可以多迭代测试几次:
# mysqlslap -a --concurrency=50,100 --number-of-queries 1000 --iterations=5 --debug-info -uroot -p123456

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