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。
–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–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
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，这里要注意了，不要用–create-schema指定已经存在的库，否则后果可能很严重。可以用–only-print来打印实际的测试过程：
$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'); ... SELECT intcol1,charcol1 FROM t1; INSERT INTO t1 VALUES (364531492,'qMa5SuKo4M5OM7ldvisSc6WK9rsG9E8sSixocHdgfa5uiiNTGFxkDJ4EAwWC2e4NL1BpAgWiFRcp1zIH6F1BayPdmwphatwnmzdwgzWnQ6SRxmcvtd6JRYwEKdvuWr'); DROP SCHEMA IF EXISTS `mysqlslap`;
可以看到最后由删除一开始创建的schema的动作，整个测试完成后不会在数据库中留下痕迹。假如我们执行一次测试，分别50和100个并发，执行 1000次总查询，那么：
$mysqlslap -a --concurrency=50,100 --number-of-queries 1000 --debug-info Benchmark Average number of seconds to run all queries: 0.375 seconds Minimum number of seconds to run all queries: 0.375 seconds Maximum number of seconds to run all queries: 0.375 seconds Number of clients running queries: 50 Average number of queries per client: 20
Benchmark
Average number of seconds to run all queries: 0.453 seconds Minimum number of seconds to run all queries: 0.453 seconds Maximum number of seconds to run all queries: 0.453 seconds Number of clients running queries: 100 Average number of queries per client: 10User time 0.29, System time 0.11
Maximum resident set size 0, Integral resident set size 0 Non-physical pagefaults 4032, Physical pagefaults 0, Swaps 0 Blocks in 0 out 0, Messages in 0 out 0, Signals 0 Voluntary context switches 7319, Involuntary context switches 681上结果可以看出，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 Benchmark Average number of seconds to run all queries: 0.380 seconds Minimum number of seconds to run all queries: 0.377 seconds Maximum number of seconds to run all queries: 0.385 seconds Number of clients running queries: 50 Average number of queries per client: 20
Benchmark
Average number of seconds to run all queries: 0.447 seconds Minimum number of seconds to run all queries: 0.444 seconds Maximum number of seconds to run all queries: 0.451 seconds Number of clients running queries: 100 Average number of queries per client: 10User time 1.44, System time 0.67
Maximum resident set size 0, Integral resident set size 0 Non-physical pagefaults 17922, Physical pagefaults 0, Swaps 0 Blocks in 0 out 0, Messages in 0 out 0, Signals 0 Voluntary context switches 36796, Involuntary context switches 4093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 Benchmark Running for engine myisam Average number of seconds to run all queries: 0.200 seconds Minimum number of seconds to run all queries: 0.188 seconds Maximum number of seconds to run all queries: 0.210 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: 0.238 seconds Minimum number of seconds to run all queries: 0.228 seconds Maximum number of seconds to run all queries: 0.251 seconds Number of clients running queries: 100 Average number of queries per client: 10Benchmark
Running for engine innodb Average number of seconds to run all queries: 0.375 seconds Minimum number of seconds to run all queries: 0.370 seconds Maximum number of seconds to run all queries: 0.379 seconds Number of clients running queries: 50 Average number of queries per client: 20Benchmark
Running for engine innodb Average number of seconds to run all queries: 0.443 seconds Minimum number of seconds to run all queries: 0.440 seconds Maximum number of seconds to run all queries: 0.447 seconds Number of clients running queries: 100 Average number of queries per client: 10User time 2.83, System time 1.66
Maximum resident set size 0, Integral resident set size 0 Non-physical pagefaults 34692, Physical pagefaults 0, Swaps 0 Blocks in 0 out 0, Messages in 0 out 0, Signals 0 Voluntary context switches 87306, Involuntary context switches 10326本文网址：