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mysqlslap - Man Page

load emulation client (mysqlslap is now a symlink to mariadb-slap)


mysqlslap [options]


mysqlslap is a diagnostic program designed to emulate client load for a MariaDB 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 you want to using 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.


Supply your own create and query SQL statements, with 50 clients querying and 200 selects for each:

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 \

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 \

mysqlslap supports the following options, which can be specified on the command line or in the [mysqlslap] and [client] option file groups. mysqlslap also supports the options for processing option files.

See Also

For more information, please refer to the MariaDB Knowledge Base, available online at https://mariadb.com/kb/


MariaDB Foundation (http://www.mariadb.org/).

Referenced By

The man page mariadb-slap(1) is an alias of mysqlslap(1).

15 May 2020 MariaDB 10.11 MariaDB Database System