mysqlslap¶
mysqlslap is a diagnostic program designed to emulate client load for a MySQL server and to report the timing of each stage. It works as if multiple clients are accessing the server.
Invoke mysqlslap like this:
shell> mysqlslap [options]
mysqlslap runs in three stages:
- Create schema, table, and optionally any stored programs or data to use for the test. This stage uses a single client connection.
- Run the load test. This stage can use many client connections.
- Clean up (disconnect, drop table if specified). This stage uses a single client connection.
Supply your own create and query SQL statements, with 50 clients querying and 200 selects for each (enter the command on a single line):
mysqlslap --delimiter=";" --create="CREATE TABLE a (b int);INSERT INTO a VALUES (23)" --query="SELECT * FROM a" --concurrency=50 --iterations=200 -uroot -p123456
Let mysqlslap build the query SQL statement with a table of two INT columns and three VARCHAR columns. Use five clients querying 20 times each. Do not create the table or insert the data (that is, use the previous test’s schema and data):
mysqlslap --concurrency=5 --iterations=20 --number-int-cols=2 --number-char-cols=3 --auto-generate-sql -uroot -p123456
Tell the program to load the create, insert, and query SQL statements from the specified files, where the create.sql file has multiple table creation statements delimited by ';' and multiple insert statements delimited by ';'. The --query file will have multiple queries delimited by ';'. Run all the load statements, then run all the queries in the query file with five clients (five times each):
mysqlslap --concurrency=5 --iterations=5 --query=query.sql --create=create.sql --delimiter=";" -uroot -p123456
mysqlslap Options¶
| Option Name | 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 | Host on which MySQL server is located | |
| --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 | Connect to server using named pipe (Windows only) | |
| --plugin-dir | Directory where plugins are installed | 5.6.2 |
| --port | TCP/IP port number 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 | Name of shared memory to use for shared-memory connections | |
| --silent | Silent mode | |
| --socket | Unix socket file or Windows named pipe to use | |
| --ssl | Enable connection encryption | |
| --ssl-ca | File that contains list of trusted SSL Certificate Authorities | |
| --ssl-capath | Directory that contains trusted SSL Certificate Authority certificate files | |
| --ssl-cert | File that contains X.509 certificate | |
| --ssl-cipher | Permissible ciphers for connection encryption | |
| --ssl-crl | File that contains certificate revocation lists | 5.6.3 |
| --ssl-crlpath | Directory that contains certificate revocation-list files | 5.6.3 |
| --ssl-key | File that contains X.509 key | |
| --ssl-mode | Desired security state of connection to server | 5.6.30 |
| --ssl-verify-server-cert | Verify host name against server certificate Common Name identity | |
| --user | MySQL user name to use when connecting to server | |
| --verbose | Verbose mode | |
| --version | Display version information and exit |