mysql之 mysql數據庫壓力測試工具（mysqlslap）
mysqlslap是從MySQL的5.1.4版開始就開始官方提供的壓力測試工具。通過模擬多個並發客戶端並發訪問MySQL來執行壓力測試，同時提供了較詳細的SQL執行數據性能報告，並且能很好的對比多個存儲引擎（MyISAM，InnoDB等）在相同環境下的相同並發壓力下的性能差別。
mysqlslap官方文檔： 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 |
參數參考表：--host=host_name, -h host_name 連接到的MySQL服務器的主機名（或IP地址），默認為本機localhost
--user=user_name, -u user_name 連接MySQL服務時用的用戶名
--password[=password], -p[password] 連接MySQL服務時用的密碼
--create-schema 代表自定義的測試庫名稱，測試的schema，MySQL中schema也就是database。
(沒指定使用哪個數據庫時，可能會遇到錯誤mysqlslap: Error when connecting to server: 1049 Unknown database ‘mysqlslap‘)
--query=name,-q 使用自定義腳本執行測試（可以是SQL字符串或腳本），例如可以調用自定義的一個存儲過程或者sql語句來執行測試。
--create 創建表所需的SQL（可以是SQL字符串或腳本）
--concurrency=N, -c N 表示並發量，也就是模擬多少個客戶端同時執行query。可指定多個值，以逗號或者--delimiter參數指定的值做為分隔符。例如：--concurrency=100,200,500（分別執行100、200、500個並發）。
--iterations=N, -i N 測試執行的叠代次數，代表要在不同的並發環境中，各自運行測試多少次；多次運行以便讓結果更加準確。
--number-of-queries=N 總的測試查詢次數(並發客戶數×每客戶查詢次數)
--engine=engine_name, -e engine_name 代表要測試的引擎，可以有多個，用分隔符隔開。例如：--engine=myisam,innodb,memory。
--auto-generate-sql, -a 自動生成測試表和數據，表示用mysqlslap工具自己生成的SQL腳本來測試並發壓力。
--auto-generate-sql-load-type=type 測試語句的類型。代表要測試的環境是讀操作還是寫操作還是兩者混合的。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). 默認值是：mixed.
--auto-generate-sql-add-auto-increment 代表對生成的表自動添加auto_increment列，從5.1.18版本開始支持。
--number-char-cols=N, -x N 自動生成的測試表中包含多少個字符類型的列，默認1
--number-int-cols=N, -y N 自動生成的測試表中包含多少個數字類型的列，默認1
--commint=N 多少條DML後提交一次。
--compress, -C 如果服務器和客戶端支持都壓縮，則壓縮信息傳遞。
--only-print 只打印測試語句而不實際執行。
--detach=N 執行N條語句後斷開重連。
--debug-info, -T 打印內存和CPU的相關信息。
mysqlslap的運行有如下3個步驟：1. 創建schema、table、test data 等 （在MySQL中，schema就是database）；
2. 運行負載測試，可以使用多個並發客戶端連接；
3. 測試環境清理（刪除創建的數據、表等）。 案例：
[[email protected] ~]# 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
[[email protected] ~]# 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
mysql之 mysql數據庫壓力測試工具（mysqlslap）