查看mysqlslap所支持的主要参数配置及说明如下
-a, --auto-generate-sql 由系统自动生成SQL脚本进行测试 Generate SQL where not supplied by file or command line. --auto-generate-sql-add-autoincrement 生成的表中增加自增的ID Add an AUTO_INCREMENT column to auto-generated tables.--auto-generate-sql-load-type=name 制定测试过程中使用的查询类型 Specify test load type: mixed, update, write, key, or read; default is mixed.--auto-generate-sql-write-number=# 制定所生成的初始化数据的条数 Number of row inserts to perform for each thread (default is 100).-c, --concurrency=name 制定并发线程的数量 Number of clients to simulate for query to run. --create=name File or string to use create tables. --create-schema=name 创建一个测试数据库的schema名称 Schema to run tests in.-T, --debug-info This is a non-debug version. Catch this and exit.指定输出额外的内存及CPU统计信息-e, --engine=name Storage engine to use for creating the table. 指定所测试的存储引擎，用逗号可以分割以便测试多个引擎 -h, --host=name Connect to host. 链接远程主机的IP -i, --iterations=# Number of times to run the tests. 指定本次测试需要运行的次数 --no-drop Do not drop the schema after the test. 指定测试完成后，不清理过程数据 -x, --number-char-cols=name 指定测试表中生成的varchar类型的数据数量 Number of VARCHAR columns to create in table if specifying --auto-generate-sql. -y, --number-int-cols=name 指定测试表中生成的int类型的数据数量 Number of INT columns to create in table if specifying --auto-generate-sql. --number-of-queries=# 指定每一个线程所执行的查询数量 Limit each client to this number of queries (this is not exact). --only-print Do not connect to the databases, but instead print out 并不运行测试脚本，而是把生成的脚本打印出来 what would have been done. -p, --password[=name] 指定测试所用的链接数据库的密码 Password to use when connecting to server. If password is not given it's asked from the tty.-q, --query=name Query to run or file containing query to run.自定义测试用的sql -u, --user=name User for login if not current user. 指定测试所用的链接数据库的用户名
其中，完整的运行脚本如下
mysqlslap -S /tmp/mysql3306.sock --concurrency=1,50,100,200 --iterations=3 --number-int-cols=5 --number-char-cols=5 --auto-generate-sql --auto-generate-sql-add-autoincrement --engine=innodb --number-of-queries=10 --create-schema=test -uroot -p
待输入密码后，测试信息如下
Enter password: Benchmark Running for engine innodb Average number of seconds to run all queries: 0.097 seconds Minimum number of seconds to run all queries: 0.093 seconds Maximum number of seconds to run all queries: 0.107 seconds Number of clients running queries: 1 Average number of queries per client: 10 Benchmark Running for engine innodb Average number of seconds to run all queries: 0.506 seconds Minimum number of seconds to run all queries: 0.447 seconds Maximum number of seconds to run all queries: 0.570 seconds Number of clients running queries: 50 Average number of queries per client: 0 Benchmark Running for engine innodb Average number of seconds to run all queries: 2.204 seconds Minimum number of seconds to run all queries: 1.595 seconds Maximum number of seconds to run all queries: 3.257 seconds Number of clients running queries: 100 Average number of queries per client: 0 mysqlslap: Error when connecting to server: 1040 Too many connections mysqlslap: Error when connecting to server: 1040 Too many connections mysqlslap: Error when connecting to server: 1040 Too many connections mysqlslap: Error when connecting to server: 1040 Too many connections
此时可以看出来，当并发达到了200的时候，出现了Too many connections的异常，这是因为mysql默认配置的最大链接数为100，故需要对my.cnf做如下的修改
添加max_connections=1024，之后运行正常
Benchmark Running for engine innodb Average number of seconds to run all queries: 0.093 seconds Minimum number of seconds to run all queries: 0.087 seconds Maximum number of seconds to run all queries: 0.098 seconds Number of clients running queries: 1 Average number of queries per client: 10 Benchmark Running for engine innodb Average number of seconds to run all queries: 0.514 seconds Minimum number of seconds to run all queries: 0.462 seconds Maximum number of seconds to run all queries: 0.545 seconds Number of clients running queries: 50 Average number of queries per client: 0 Benchmark Running for engine innodb Average number of seconds to run all queries: 1.209 seconds Minimum number of seconds to run all queries: 1.173 seconds Maximum number of seconds to run all queries: 1.241 seconds Number of clients running queries: 100 Average number of queries per client: 0 Benchmark Running for engine innodb Average number of seconds to run all queries: 2.174 seconds Minimum number of seconds to run all queries: 1.978 seconds Maximum number of seconds to run all queries: 2.402 seconds Number of clients running queries: 200 Average number of queries per client: 0