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。
- --auto-generate-sql, -a
- 自动生成测试表和数据
- --auto-generate-sql-load-type=type
- 测试语句的类型。取值包括：read，key，write，update和mixed(默认)。
- --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
- 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
- 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
- --engine=engine_name, -e engine_name
- 创建测试表所使用的存储引擎，可指定多个，用分隔符隔开。
- --iterations=N, -i N
- 测试执行的迭代次数
- --detach=N
- 执行N条语句后断开重连
- --debug-info, -T
- 打印内存和CPU的信息
- --only-print
- 只打印测试语句而不实际执行
- --defaults-file
- 配置文件存放位置
- --socket＝name,-S
- 指定socket文件位置
一些实例
用自动生成的测试数据进行测试，且只打印实际的测试过程。
- # /usr/local/webserver/mysql/bin/mysqlslap -a --only-print
- DROP SCHEMA IF EXISTS `mysqlslap`;
- CREATE SCHEMA `mysqlslap`;
- use mysqlslap;
- CREATE TABLE `t1` (intcol1 INT(32) ,charcol1 VARCHAR(128));
- INSERT INTO t1 VALUES (1804289383,'mxvtvmC9127qJNm06sGB8R92q2j7vTiiITRDGXM9ZLzkdekbWtmXKwZ2qG1llkRw5m9DHOFilEREk3q7oce8O3BEJC0woJsm6uzFAEynLH2xCsw1KQ1lT4zg9rdxBL');
- INSERT INTO t1 VALUES (822890675,'97RGHZ65mNzkSrYT3zWoSbg9cNePQr1bzSk81qDgE4Oanw3rnPfGsBHSbnu1evTdFDe83ro9w4jjteQg4yoo9xHck3WNqzs54W5zEm92ikdRF48B2oz3m8gMBAl11W');
- ......
- INSERT INTO t1 VALUES (100669,'qnMdipW5KkXdTjGCh2PNzLoeR0527frpQDQ8uw67Ydk1K06uuNHtkxYBxT5w8plb2BbpzhwYBgPNYX9RmICWGkZD6fAESvhMzH3yqzMtXoH4BQNylbK1CmEIPGYlC6');
- SELECT intcol1,charcol1 FROM t1;
- INSERT INTO t1 VALUES (73673339,'BN3152Gza4GW7atxJKACYwJqDbFynLxqc0kh30YTwgz3FktQ43XTrqJ4PQ25frn7kXhfXD8RuzN1j8Rf3y8ugKy6es3IbqPJM6ylCyD6xS7YcQCfHKZxYNvB7yTahm');
- DROP SCHEMA IF EXISTS `mysqlslap`;
分别100和200个并发，执行1000次总查询
- $mysqlslap -a --concurrency=50,100 --number-of-queries 1000 --debug-info
- # /usr/local/webserver/mysql/bin/mysqlslap -a --concurrency=100,200 --number-of-queries 1000 --debug-info
- Benchmark
- Average number of seconds to run all queries: 0.232 seconds
- Minimum number of seconds to run all queries: 0.232 seconds
- Maximum number of seconds to run all queries: 0.232 seconds
- Number of clients running queries: 100
- Average number of queries per client: 10
- Benchmark
- Average number of seconds to run all queries: 0.268 seconds
- Minimum number of seconds to run all queries: 0.268 seconds
- Maximum number of seconds to run all queries: 0.268 seconds
- Number of clients running queries: 200
- Average number of queries per client: 5
- User time 0.02, System time 0.49
- Maximum resident set size 6100, Integral resident set size 0
- Non-physical pagefaults 3165, Physical pagefaults 0, Swaps 0
- Blocks in 0 out 0, Messages in 0 out 0, Signals 0
- Voluntary context switches 3102, Involuntary context switches 7541
分别200和400个并发，执行2000次总查询并迭代8次
- # /usr/local/webserver/mysql/bin/mysqlslap -a --concurrency=200,400 --number-of-queries 2000 --iterations=8 --debug-info
- Benchmark
- Average number of seconds to run all queries: 0.657 seconds
- Minimum number of seconds to run all queries: 0.603 seconds
- Maximum number of seconds to run all queries: 0.736 seconds
- Number of clients running queries: 200
- Average number of queries per client: 10
- Benchmark
- Average number of seconds to run all queries: 0.711 seconds
- Minimum number of seconds to run all queries: 0.648 seconds
- Maximum number of seconds to run all queries: 0.860 seconds
- Number of clients running queries: 400
- Average number of queries per client: 5
- User time 0.58, System time 9.12
- Maximum resident set size 30764, Integral resident set size 0
- Non-physical pagefaults 92471, Physical pagefaults 0, Swaps 0
- Blocks in 0 out 0, Messages in 0 out 0, Signals 0
- Voluntary context switches 99629, Involuntary context switches 157741
同时测试不同的存储引擎
- # /usr/local/webserver/mysql/bin/mysqlslap -a --concurrency=200,400 --number-of-queries 2000 --iterations=8 --engine=myisam,innodb --debug-info
- Benchmark
- Average number of seconds to run all queries: 0.740 seconds
- Minimum number of seconds to run all queries: 0.678 seconds
- Maximum number of seconds to run all queries: 0.827 seconds
- Number of clients running queries: 200
- Average number of queries per client: 10
- Benchmark
- Average number of seconds to run all queries: 0.696 seconds
- Minimum number of seconds to run all queries: 0.661 seconds
- Maximum number of seconds to run all queries: 0.775 seconds
- Number of clients running queries: 400
- Average number of queries per client: 5
- User time 0.62, System time 9.27
- Maximum resident set size 33368, Integral resident set size 0
- Non-physical pagefaults 89594, Physical pagefaults 0, Swaps 0
- Blocks in 0 out 0, Messages in 0 out 0, Signals 0
- Voluntary context switches 98328, Involuntary context switches 153787
指定数据库的测试
- # /usr/local/webserver/mysql/bin/mysqlslap --concurrency=500 --iterations=8 --create-schema=test --query=/root/test.sql
- Benchmark
- Average number of seconds to run all queries: 0.343 seconds
- Minimum number of seconds to run all queries: 0.283 seconds
- Maximum number of seconds to run all queries: 0.525 seconds
- Number of clients running queries: 500
- Average number of queries per client: 1
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