mysqlslap
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mysqlslap is a tool for load-testing MariaDB. It allows you to emulate multiple concurrent connections, and run a set of queries multiple times.
It returns a benchmark including the following information:
- Average number of seconds to run all queries
- Minimum number of seconds to run all queries
- Maximum number of seconds to run all queries
- Number of clients running queries
- Average number of queries per client
Syntax
mysqlslap [options]
Options
The following variables can be set while passed as commandline options to mysqlslap, or set in the [mysqlslap], [client], [client-server] or [client-mariadb] sections in your my.cnf file.
| Option | Description |
|---|---|
-a, --auto-generate-sql | Generate SQL where not supplied by file or command line. |
--auto-generate-sql-add-autoincrement | Add an AUTO_INCREMENT column to auto-generated tables. |
--auto-generate-sql-execute-number=num | Set this number to generate a set number of queries to run. |
--auto-generate-sql-guid-primary | Add GUID based primary keys to auto-generated tables. |
--auto-generate-sql-load-type=name | Specify test load type: mixed, update, write, key, or read; default is mixed. |
--auto-generate-sql-secondary-indexes=num | Number of secondary indexes to add to auto-generated tables. |
--auto-generate-sql-unique-query-number=num | Number of unique queries to generate for automatic tests. |
--auto-generate-sql-unique-write-number=num | Number of unique queries to generate for auto-generate-sql-write-number. |
--auto-generate-sql-write-number=num | Number of row inserts to perform for each thread (default is 100). |
--commit=num | Commit records every X number of statements. |
-C, --compress | Use compression in server/client protocol. |
-c name, --concurrency=name | Number of clients to simulate for query to run. |
--create=name | File or string to use create tables. |
--create-schema=name | Schema to run tests in. |
--csv[=name] | Generate CSV output to named file or to stdout if no file is named. |
-# , --debug[=options] | This is a non-debug version. Catch this and exit. |
--debug-check | Check memory and open file usage at exit. |
-T, --debug-info | Print some debug info at exit. |
--default-auth=name | Default authentication client-side plugin to use. |
-F name, --delimiter=name | Delimiter to use in SQL statements supplied in file or command line. |
--detach=num | Detach (close and reopen) connections after X number of requests. |
-e name, --engine=name | Comma separated list of storage engines to use for creating the table. The test is run for each engine. You can also specify an option for an engine after a `:', like memory:max_row=2300 |
-?, --help | Display help and exit. |
-h name, --host=name | Connect to host. |
-i num, --iterations=num | Number of times to run the tests. |
--no-drop | Do not drop the schema after the test. |
-x name, --number-char-cols=name | Number of VARCHAR columns to create in table if specifying --auto-generate-sql. |
-y name, --number-int-cols=name | Number of INT columns to create in table if specifying --auto-generate-sql. |
--number-of-queries=num | Limit each client to this number of queries (this is not exact). |
--only-print | Do not connect to the databases, but instead print out what would have been done. |
-p[password], --password[=password] | Password to use when connecting to server. If password is not given it's asked from the tty. |
--plugin-dir=name | Directory for client-side plugins. |
-P num, --port=num | Port number to use for connection. |
--post-query=name | Query to run or file containing query to execute after tests have completed. |
--post-system=name | system() string to execute after tests have completed. |
--pre-query=name | Query to run or file containing query to execute before running tests. |
--pre-system=name | system() string to execute before running tests. |
--protocol=name | The protocol to use for connection (tcp, socket, pipe, memory). |
-q name, --query=name | Query to run or file containing query to run. |
-s, --silent | Run program in silent mode - no output. |
-S name, --socket=name | The socket file to use for connection. |
--ssl | Enable SSL for connection (automatically enabled with other flags). |
--ssl-ca=name | CA file in PEM format (check OpenSSL docs, implies --ssl). |
--ssl-capath=name | CA directory (check OpenSSL docs, implies --ssl). |
--ssl-cert=name | X509 cert in PEM format (implies --ssl). |
--ssl-cipher=name | SSL cipher to use (implies --ssl). |
--ssl-key=name | X509 key in PEM format (implies --ssl). |
--ssl-crl=name | Certificate revocation list (implies --ssl). |
--ssl-crlpath=name | Certificate revocation list path (implies --ssl). |
--ssl-verify-server-cert | Verify server's "Common Name" in its cert against hostname used when connecting. This option is disabled by default. |
-u, --user=name | User for login if not current user. |
-v, --verbose | More verbose output; you can use this multiple times to get even more verbose output. |
-V, --version | Output version information and exit. |
Examples
Create a table with data, and then query it with 40 simultaneous connections 100 times each.
mysqlslap --delimiter=";" --create="CREATE TABLE t (a int);INSERT INTO t VALUES (5)" --query="SELECT * FROM t" --concurrency=40 --iterations=100 Benchmark Average number of seconds to run all queries: 0.010 seconds Minimum number of seconds to run all queries: 0.009 seconds Maximum number of seconds to run all queries: 0.020 seconds Number of clients running queries: 40 Average number of queries per client: 1
Using files to store the create and query SQL. Each file can contain multiple statements separated by the specified delimiter.
mysqlslap --create=define.sql --query=query.sql --concurrency=10 --iterations=20 --delimiter=";" Benchmark Average number of seconds to run all queries: 0.002 seconds Minimum number of seconds to run all queries: 0.002 seconds Maximum number of seconds to run all queries: 0.004 seconds Number of clients running queries: 10 Average number of queries per client: 1
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