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mysqlslap是从MySQL的5.1.4版开始就开始官方提供的压力测试工具。通过模拟多个并发客户端并发访问MySQL来执行压力测试，同时提供了较详细的SQL执行数据性能报告，并且能很好的对比多个存储引擎（MyISAM，InnoDB等）在相同环境下的相同并发压力下的性能差别。
mysqlslap官方文档： https://dev.mysql.com/doc/refman/5.6/en/mysqlslap.html
Table 4.14 mysqlslap Options
| Format | Description | Introduced |
|---|---|---|
| –auto-generate-sql | Generate SQL statements automatically when they are not supplied in files or using command options | |
| –auto-generate-sql-add-autoincrement | Add AUTO_INCREMENT column to automatically generated tables | |
| –auto-generate-sql-execute-number | Specify how many queries to generate automatically | |
| –auto-generate-sql-guid-primary | Add a GUID-based primary key to automatically generated tables | |
| –auto-generate-sql-load-type | Specify the test load type | |
| –auto-generate-sql-secondary-indexes | Specify how many secondary indexes to add to automatically generated tables | |
| –auto-generate-sql-unique-query-number | How many different queries to generate for automatic tests. | |
| –auto-generate-sql-unique-write-number | How many different queries to generate for –auto-generate-sql-write-number | |
| –auto-generate-sql-write-number | How many row inserts to perform on each thread | |
| –commit | How many statements to execute before committing. | |
| –compress | Compress all information sent between client and server | |
| –concurrency | Number of clients to simulate when issuing the SELECT statement | |
| –create | File or string containing the statement to use for creating the table | |
| –create-schema | Schema in which to run the tests | |
| –csv | Generate output in comma-separated values format | |
| –debug | Write debugging log | |
| –debug-check | Print debugging information when program exits | |
| –debug-info | Print debugging information, memory, and CPU statistics when program exits | |
| –default-auth | Authentication plugin to use | 5.6.2 |
| –defaults-extra-file | Read named option file in addition to usual option files | |
| –defaults-file | Read only named option file | |
| –defaults-group-suffix | Option group suffix value | |
| –delimiter | Delimiter to use in SQL statements | |
| –detach | Detach (close and reopen) each connection after each N statements | |
| –enable-cleartext-plugin | Enable cleartext authentication plugin | 5.6.7 |
| –engine | Storage engine to use for creating the table | |
| –help | Display help message and exit | |
| –host | Connect to MySQL server on given host | |
| –iterations | Number of times to run the tests | |
| –login-path | Read login path options from .mylogin.cnf | 5.6.6 |
| –no-defaults | Read no option files | |
| –no-drop | Do not drop any schema created during the test run | 5.6.3 |
| –number-char-cols | Number of VARCHAR columns to use if –auto-generate-sql is specified | |
| –number-int-cols | Number of INT columns to use if –auto-generate-sql is specified | |
| –number-of-queries | Limit each client to approximately this number of queries | |
| –only-print | Do not connect to databases. mysqlslap only prints what it would have done | |
| –password | Password to use when connecting to server | |
| –pipe | On Windows, connect to server using named pipe | |
| –plugin-dir | Directory where plugins are installed | 5.6.2 |
| –port | TCP/IP port number to use for connection | |
| –post-query | File or string containing the statement to execute after the tests have completed | |
| –post-system | String to execute using system() after the tests have completed | |
| –pre-query | File or string containing the statement to execute before running the tests | |
| –pre-system | String to execute using system() before running the tests | |
| –print-defaults | Print default options | |
| –protocol | Connection protocol to use | |
| –query | File or string containing the SELECT statement to use for retrieving data | |
| –secure-auth | Do not send passwords to server in old (pre-4.1) format | 5.6.17 |
| –shared-memory-base-name | The name of shared memory to use for shared-memory connections | |
| –silent | Silent mode | |
| –socket | For connections to localhost, the Unix socket file to use | |
| –ssl | Enable secure connection | |
| –ssl-ca | Path of file that contains list of trusted SSL CAs | |
| –ssl-capath | Path of directory that contains trusted SSL CA certificates in PEM format | |
| –ssl-cert | Path of file that contains X509 certificate in PEM format | |
| –ssl-cipher | List of permitted ciphers to use for connection encryption | |
| –ssl-crl | Path of file that contains certificate revocation lists | 5.6.3 |
| –ssl-crlpath | Path of directory that contains certificate revocation list files | 5.6.3 |
| –ssl-key | Path of file that contains X509 key in PEM format | |
| –ssl-mode | Security state of connection to server | 5.6.30 |
| –ssl-verify-server-cert | Verify server certificate Common Name value against host name used when connecting to server | |
| –user | MySQL user name to use when connecting to server | |
| –verbose | Verbose mode | |
| –version | Display version information and exit |
参数参考表： --host=host_name, -h host_name 连接到的MySQL服务器的主机名（或IP地址），默认为本机localhost
–user=user_name, -u user_name 连接MySQL服务时用的用户名
–password[=password], -p[password] 连接MySQL服务时用的密码
–create-schema 代表自定义的测试库名称，测试的schema，MySQL中schema也就是database。
(没指定使用哪个数据库时，可能会遇到错误mysqlslap: Error when connecting to server: 1049 Unknown database 'mysqlslap')
–query=name,-q 使用自定义脚本执行测试（可以是SQL字符串或脚本），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 创建表所需的SQL（可以是SQL字符串或脚本）
–concurrency=N, -c N 表示并发量，也就是模拟多少个客户端同时执行query。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（分别执行100、200、500个并发）。
–iterations=N, -i N 测试执行的迭代次数，代表要在不同的并发环境中，各自运行测试多少次；多次运行以便让结果更加准确。
–number-of-queries=N 总的测试查询次数(并发客户数×每客户查询次数)
–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：–engine=myisam,innodb,memory。
–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 (scan tables), write (insert into tables), key (read primary keys), update (update primary keys), or mixed (half inserts, half scanning selects). 默认值是：mixed.
–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
–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。
–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。 mysqlslap的运行有如下3个步骤：
1. 创建schema、table、test data 等 （在MySQL中，schema就是database）；
2. 运行负载测试，可以使用多个并发客户端连接；
3. 测试环境清理（删除创建的数据、表等）。
案例：
[root@mysql ~]# mysqlslap -a –concurrency=50,100 –number-of-queries 1000 –auto-generate-sql-add-autoincrement –number-char-cols=10 –number-int-cols=5 -poracle
Warning: Using a password on the command line interface can be insecure.
Benchmark
Average number of seconds to run all queries: 0.775 seconds
Minimum number of seconds to run all queries: 0.775 seconds
Maximum number of seconds to run all queries: 0.775 seconds
Number of clients running queries: 50
Average number of queries per client: 20
Benchmark
Average number of seconds to run all queries: 0.984 seconds
Minimum number of seconds to run all queries: 0.984 seconds
Maximum number of seconds to run all queries: 0.984 seconds
Number of clients running queries: 100
Average number of queries per client: 10
[root@mysql ~]# mysqlslap -a –concurrency=50,100 –number-of-queries 1000 –auto-generate-sql-add-autoincrement –number-char-cols=10 –number-int-cols=5 –engine=myisam,innodb -poracle
Warning: Using a password on the command line interface can be insecure.
Benchmark
Running for engine myisam
Average number of seconds to run all queries: 0.117 seconds
Minimum number of seconds to run all queries: 0.117 seconds
Maximum number of seconds to run all queries: 0.117 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: 0.129 seconds
Minimum number of seconds to run all queries: 0.129 seconds
Maximum number of seconds to run all queries: 0.129 seconds
Number of clients running queries: 100
Average number of queries per client: 10
Benchmark
Running for engine innodb
Average number of seconds to run all queries: 1.665 seconds
Minimum number of seconds to run all queries: 1.665 seconds
Maximum number of seconds to run all queries: 1.665 seconds
Number of clients running queries: 50
Average number of queries per client: 20
Benchmark
Running for engine innodb
Average number of seconds to run all queries: 1.480 seconds
Minimum number of seconds to run all queries: 1.480 seconds
Maximum number of seconds to run all queries: 1.480 seconds
Number of clients running queries: 100
Average number of queries per client: 10
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