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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

Table4.14mysqlslapOptions

FormatDescriptionIntroduced--auto-generate-sqlGenerate SQL statements automatically when they are not supplied in files or using command options--auto-generate-sql-add-autoincrementAdd AUTO_INCREMENT column to automatically generated tables--auto-generate-sql-execute-numberSpecify how many queries to generate automatically--auto-generate-sql-guid-primaryAdd a GUID-based primary key to automatically generated tables--auto-generate-sql-load-typeSpecify the test load type--auto-generate-sql-secondary-indexesSpecify how many secondary indexes to add to automatically generated tables--auto-generate-sql-unique-query-numberHow many different queries to generate for automatic tests.--auto-generate-sql-unique-write-numberHow many different queries to generate for --auto-generate-sql-write-number--auto-generate-sql-write-numberHow many row inserts to perform on each thread--commitHow many statements to execute before committing.--compressCompress all information sent between client and server--concurrencyNumber of clients to simulate when issuing the SELECT statement--createFile or string containing the statement to use for creating the table--create-schemaSchema in which to run the tests--csvGenerate output in comma-separated values format--debugWrite debugging log--debug-checkPrint debugging information when program exits--debug-infoPrint debugging information, memory, and CPU statistics when program exits--default-authAuthentication plugin to use5.6.2--defaults-extra-fileRead named option file in addition to usual option files--defaults-fileRead only named option file--defaults-group-suffixOption group suffix value--delimiterDelimiter to use in SQL statements--detachDetach (close and reopen) each connection after each N statements--enable-cleartext-pluginEnable cleartext authentication plugin5.6.7--engineStorage engine to use for creating the table--helpDisplay help message and exit--hostConnect to MySQL server on given host--iterationsNumber of times to run the tests--login-pathRead login path options from .mylogin.cnf5.6.6--no-defaultsRead no option files--no-dropDo not drop any schema created during the test run5.6.3--number-char-colsNumber of VARCHAR columns to use if --auto-generate-sql is specified--number-int-colsNumber of INT columns to use if --auto-generate-sql is specified--number-of-queriesLimit each client to approximately this number of queries--only-printDo not connect to databases. mysqlslap only prints what it would have done--passwordPassword to use when connecting to server--pipeOn Windows, connect to server using named pipe--plugin-dirDirectory where plugins are installed5.6.2--portTCP/IP port number to use for connection--post-queryFile or string containing the statement to execute after the tests have completed--post-systemString to execute using system() after the tests have completed--pre-queryFile or string containing the statement to execute before running the tests--pre-systemString to execute using system() before running the tests--print-defaultsPrint default options--protocolConnection protocol to use--queryFile or string containing the SELECT statement to use for retrieving data--secure-authDo not send passwords to server in old (pre-4.1) format5.6.17--shared-memory-base-nameThe name of shared memory to use for shared-memory connections--silentSilent mode--socketFor connections to localhost, the Unix socket file to use--sslEnable secure connection--ssl-caPath of file that contains list of trusted SSL CAs--ssl-capathPath of directory that contains trusted SSL CA certificates in PEM format--ssl-certPath of file that contains X509 certificate in PEM format--ssl-cipherList of permitted ciphers to use for connection encryption--ssl-crlPath of file that contains certificate revocation lists5.6.3--ssl-crlpathPath of directory that contains certificate revocation list files5.6.3--ssl-keyPath of file that contains X509 key in PEM format--ssl-modeSecurity state of connection to server5.6.30--ssl-verify-server-certVerify server certificate Common Name value against host name used when connecting to server--userMySQL user name to use when connecting to server--verboseVerbose mode--versionDisplay version information and exit

参数参考表：--host=host_name,-hhost_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 (readprimary 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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