4.5.7. mysqlslap — Load Emulation Client

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]

Some options such as --create or --query enable you to specify a string containing an SQL statement or a file containing statements. If you specify a file, by default it must contain one statement per line. (That is, the implicit statement delimiter is the newline character.) Use the --delimiter option to specify a different delimiter, which enables you to specify statements that span multiple lines or place multiple statements on a single line. You cannot include comments in a file; mysqlslap does not understand them.

mysqlslap runs in three stages:

  1. Create schema, table, and optionally any stored programs or data to use for the test. This stage uses a single client connection.

  2. Run the load test. This stage can use many client connections.

  3. Clean up (disconnect, drop table if specified). This stage uses a single client connection.

Examples:

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

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

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=";"

mysqlslap supports the following options, which can be specified on the command line or in the [mysqlslap] and [client] groups of an option file. mysqlslap also supports the options for processing option files described at Section 4.2.3.4, "Command-Line Options that Affect Option-File Handling".

Table 4.10. mysqlslap Options

Format Option File Description
--auto-generate-sql auto-generate-sql Generate SQL statements automatically when they are not supplied in files or using command options
--auto-generate-sql-add-autoincrement auto-generate-sql-add-autoincrement Add AUTO_INCREMENT column to automatically generated tables
--auto-generate-sql-execute-number=# auto-generate-sql-execute-number Specify how many queries to generate automatically
--auto-generate-sql-guid-primary auto-generate-sql-guid-primary Add a GUID-based primary key to automatically generated tables
--auto-generate-sql-load-type=type auto-generate-sql-load-type Specify how many queries to generate automatically
--auto-generate-sql-secondary-indexes=# auto-generate-sql-secondary-indexes Specify how many secondary indexes to add to automatically generated tables
--auto-generate-sql-unique-query-number=# auto-generate-sql-unique-query-number How many different queries to generate for automatic tests.
--auto-generate-sql-unique-write-number=# auto-generate-sql-unique-write-number How many different queries to generate for --auto-generate-sql-write-number
--auto-generate-sql-write-number=# auto-generate-sql-write-number How many row inserts to perform on each thread
--commit=# commit How many statements to execute before committing.
--compress compress Compress all information sent between the client and the server
--concurrency=# concurrency The number of clients to simulate when issuing the SELECT statement
--create=value create The file or string containing the statement to use for creating the table
--create-schema=value create-schema The schema in which to run the tests
--csv=[file] csv Generate output in comma-separated values format
--debug[=debug_options] debug Write a debugging log
--debug-check debug-check Print debugging information when the program exits
--debug-info debug-info Print debugging information, memory and CPU statistics when the program exits
--default-auth=plugin default-auth=plugin The authentication plugin to use
--delimiter=str delimiter The delimiter to use in SQL statements
--detach=# detach Detach (close and reopen) each connection after each N statements
--enable-cleartext-plugin enable-cleartext-plugin Enable cleartext authentication plugin
--engine=engine_name engine The storage engine to use for creating the table
--help Display help message and exit
--host=host_name host Connect to the MySQL server on the given host
--iterations=# iterations The number of times to run the tests
--login-path=name Read login path options from .mylogin.cnf
--no-drop no-drop Do not drop any schema created during the test run
--number-char-cols=# number-char-cols The number of VARCHAR columns to use if --auto-generate-sql is specified
--number-int-cols=# number-int-cols The number of INT columns to use if --auto-generate-sql is specified
--number-of-queries=# number-of-queries Limit each client to approximately this number of queries
--only-print only-print Do not connect to databases. mysqlslap only prints what it would have done
--password[=password] password The password to use when connecting to the server
--pipe On Windows, connect to server using a named pipe
--plugin-dir=path plugin-dir=path The directory where plugins are located
--port=port_num port The TCP/IP port number to use for the connection
--post-query=value post-query The file or string containing the statement to execute after the tests have completed
--post-system=str post-system The string to execute using system() after the tests have completed
--pre-query=value pre-query The file or string containing the statement to execute before running the tests
--pre-system=str pre-system The string to execute using system() before running the tests
--protocol=type protocol The connection protocol to use
--query=value query The file or string containing the SELECT statement to use for retrieving data
--silent silent Silent mode
--socket=path socket For connections to localhost
--ssl-ca=file_name ssl-ca The path to a file that contains a list of trusted SSL CAs
--ssl-capath=dir_name ssl-capath The path to a directory that contains trusted SSL CA certificates in PEM format
--ssl-cert=file_name ssl-cert The name of the SSL certificate file to use for establishing a secure connection
--ssl-cipher=cipher_list ssl-cipher A list of allowable ciphers to use for SSL encryption
--ssl-crl=file_name ssl-crl The path to a file that contains certificate revocation lists
--ssl-crlpath=dir_name ssl-crlpath The path to a directory that contains certificate revocation list files
--ssl-key=file_name ssl-key The name of the SSL key file to use for establishing a secure connection
--ssl-verify-server-cert ssl-verify-server-cert The server's Common Name value in its certificate is verified against the host name used when connecting to the server
--user=user_name, user MySQL user name to use when connecting to server
--verbose Verbose mode
--version Display version information and exit




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