mysqlslap
MYSQLSLAP(1) MySQL Database System MYSQLSLAP(1)
NAME
mysqlslap - a load emulation client
SYNOPSIS
mysqlslap [options]
DESCRIPTION
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:
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 should contain 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. For information about option files used by MySQL programs, see
Section 4.2.2.2, "Using Option Files".
o --help, -? Display a help message and exit.
o --auto-generate-sql, -a Generate SQL statements automatically when
they are not supplied in files or using command options.
o --auto-generate-sql-add-autoincrement Add an AUTO_INCREMENT column
to automatically generated tables.
o --auto-generate-sql-execute-number=N Specify how many queries to
generate automatically.
o --auto-generate-sql-guid-primary Add a GUID-based primary key to
automatically generated tables.
o --auto-generate-sql-load-type=type Specify the test load type. The
permissible values are read (scan tables), write (insert into
tables), key (read primary keys), update (update primary keys), or
mixed (half inserts, half scanning selects). The default is mixed.
o --auto-generate-sql-secondary-indexes=N Specify how many secondary
indexes to add to automatically generated tables. By default, none
are added.
o --auto-generate-sql-unique-query-number=N How many different
queries to generate for automatic tests. For example, if you run a
key test that performs 1000 selects, you can use this option with a
value of 1000 to run 1000 unique queries, or with a value of 50 to
perform 50 different selects. The default is 10.
o --auto-generate-sql-unique-write-number=N How many different
queries to generate for --auto-generate-sql-write-number. The
default is 10.
o --auto-generate-sql-write-number=N How many row inserts to perform.
The default is 100.
o --commit=N How many statements to execute before committing. The
default is 0 (no commits are done).
o --compress, -C Compress all information sent between the client and
the server if possible. See Section 4.2.8, "Connection Compression
Control".
As of MySQL 8.0.18, this option is deprecated. Expect it to be
removed in a future version of MySQL. See the section called
"Configuring Legacy Connection Compression".
o --compression-algorithms=value The permitted compression algorithms
for connections to the server. The available algorithms are the
same as for the protocol_compression_algorithms system variable.
The default value is uncompressed.
For more information, see Section 4.2.8, "Connection Compression
Control".
This option was added in MySQL 8.0.18.
o --concurrency=N, -c N The number of parallel clients to simulate.
o --create=value The file or string containing the statement to use
for creating the table.
o --create-schema=value The schema in which to run the tests.
Note
If the --auto-generate-sql option is also given, mysqlslap
drops the schema at the end of the test run. To avoid this, use
the --no-drop option as well.
o --csv[=file_name] Generate output in comma-separated values format.
The output goes to the named file, or to the standard output if no
file is given.
o --debug[=debug_options], -# [debug_options] Write a debugging log.
A typical debug_options string is d:t:o,file_name. The default is
d:t:o,/tmp/mysqlslap.trace.
This option is available only if MySQL was built using WITH_DEBUG.
MySQL release binaries provided by Oracle are not built using this
option.
o --debug-check Print some debugging information when the program
exits.
This option is available only if MySQL was built using WITH_DEBUG.
MySQL release binaries provided by Oracle are not built using this
option.
o --debug-info, -T Print debugging information and memory and CPU
usage statistics when the program exits.
This option is available only if MySQL was built using WITH_DEBUG.
MySQL release binaries provided by Oracle are not built using this
option.
o --default-auth=plugin A hint about which client-side authentication
plugin to use. See Section 6.2.17, "Pluggable Authentication".
o --defaults-extra-file=file_name Read this option file after the
global option file but (on Unix) before the user option file. If
the file does not exist or is otherwise inaccessible, an error
occurs. If file_name is not an absolute path name, it is
interpreted relative to the current directory.
For additional information about this and other option-file
options, see Section 4.2.2.3, "Command-Line Options that Affect
Option-File Handling".
o --defaults-file=file_name Use only the given option file. If the
file does not exist or is otherwise inaccessible, an error occurs.
If file_name is not an absolute path name, it is interpreted
relative to the current directory.
Exception: Even with --defaults-file, client programs read
.mylogin.cnf.
For additional information about this and other option-file
options, see Section 4.2.2.3, "Command-Line Options that Affect
Option-File Handling".
o --defaults-group-suffix=str Read not only the usual option groups,
but also groups with the usual names and a suffix of str. For
example, mysqlslap normally reads the [client] and [mysqlslap]
groups. If this option is given as --defaults-group-suffix=_other,
mysqlslap also reads the [client_other] and [mysqlslap_other]
groups.
For additional information about this and other option-file
options, see Section 4.2.2.3, "Command-Line Options that Affect
Option-File Handling".
o --delimiter=str, -F str The delimiter to use in SQL statements
supplied in files or using command options.
o --detach=N Detach (close and reopen) each connection after each N
statements. The default is 0 (connections are not detached).
o --enable-cleartext-plugin Enable the mysql_clear_password cleartext
authentication plugin. (See Section 6.4.1.4, "Client-Side Cleartext
Pluggable Authentication".)
o --engine=engine_name, -e engine_name The storage engine to use for
creating tables.
o --get-server-public-key Request from the server the RSA public key
that it uses for key pair-based password exchange. This option
applies to clients that connect to the server using an account that
authenticates with the caching_sha2_password authentication plugin.
For connections by such accounts, the server does not send the
public key to the client unless requested. The option is ignored
for accounts that do not authenticate with that plugin. It is also
ignored if RSA-based password exchange is not needed, as is the
case when the client connects to the server using a secure
connection.
If --server-public-key-path=file_name is given and specifies a
valid public key file, it takes precedence over
--get-server-public-key.
For information about the caching_sha2_password plugin, see
Section 6.4.1.2, "Caching SHA-2 Pluggable Authentication".
o --host=host_name, -h host_name Connect to the MySQL server on the
given host.
o --iterations=N, -i N The number of times to run the tests.
o --login-path=name Read options from the named login path in the
.mylogin.cnf login path file. A "login path" is an option group
containing options that specify which MySQL server to connect to
and which account to authenticate as. To create or modify a login
path file, use the mysql_config_editor utility. See
mysql_config_editor(1).
For additional information about this and other option-file
options, see Section 4.2.2.3, "Command-Line Options that Affect
Option-File Handling".
o --no-drop Prevent mysqlslap from dropping any schema it creates
during the test run.
o --no-defaults Do not read any option files. If program startup
fails due to reading unknown options from an option file,
--no-defaults can be used to prevent them from being read.
The exception is that the .mylogin.cnf file is read in all cases,
if it exists. This permits passwords to be specified in a safer way
than on the command line even when --no-defaults is used. To create
.mylogin.cnf, use the mysql_config_editor utility. See
mysql_config_editor(1).
For additional information about this and other option-file
options, see Section 4.2.2.3, "Command-Line Options that Affect
Option-File Handling".
o --number-char-cols=N, -x N The number of VARCHAR columns to use if
--auto-generate-sql is specified.
o --number-int-cols=N, -y N The number of INT columns to use if
--auto-generate-sql is specified.
o --number-of-queries=N Limit each client to approximately this many
queries. Query counting takes into account the statement delimiter.
For example, if you invoke mysqlslap as follows, the ; delimiter is
recognized so that each instance of the query string counts as two
queries. As a result, 5 rows (not 10) are inserted.
mysqlslap --delimiter=";" --number-of-queries=10
--query="use test;insert into t values(null)"
o --only-print Do not connect to databases. mysqlslap only prints
what it would have done.
o --password[=password], -p[password] The password of the MySQL
account used for connecting to the server. The password value is
optional. If not given, mysqlslap prompts for one. If given, there
must be no space between --password= or -p and the password
following it. If no password option is specified, the default is to
send no password.
Specifying a password on the command line should be considered
insecure. To avoid giving the password on the command line, use an
option file. See Section 6.1.2.1, "End-User Guidelines for Password
Security".
To explicitly specify that there is no password and that mysqlslap
should not prompt for one, use the --skip-password option.
o --password1[=pass_val] The password for multifactor authentication
factor 1 of the MySQL account used for connecting to the server.
The password value is optional. If not given, mysqlslap prompts for
one. If given, there must be no space between --password1= and the
password following it. If no password option is specified, the
default is to send no password.
Specifying a password on the command line should be considered
insecure. To avoid giving the password on the command line, use an
option file. See Section 6.1.2.1, "End-User Guidelines for Password
Security".
To explicitly specify that there is no password and that mysqlslap
should not prompt for one, use the --skip-password1 option.
--password1 and --password are synonymous, as are --skip-password1
and --skip-password.
o --password2[=pass_val] The password for multifactor authentication
factor 2 of the MySQL account used for connecting to the server.
The semantics of this option are similar to the semantics for
--password1; see the description of that option for details.
o --password3[=pass_val] The password for multifactor authentication
factor 3 of the MySQL account used for connecting to the server.
The semantics of this option are similar to the semantics for
--password1; see the description of that option for details.
o --pipe, -W On Windows, connect to the server using a named pipe.
This option applies only if the server was started with the
named_pipe system variable enabled to support named-pipe
connections. In addition, the user making the connection must be a
member of the Windows group specified by the
named_pipe_full_access_group system variable.
o --plugin-dir=dir_name The directory in which to look for plugins.
Specify this option if the --default-auth option is used to specify
an authentication plugin but mysqlslap does not find it. See
Section 6.2.17, "Pluggable Authentication".
o --port=port_num, -P port_num For TCP/IP connections, the port
number to use.
o --post-query=value The file or string containing the statement to
execute after the tests have completed. This execution is not
counted for timing purposes.
o --post-system=str The string to execute using system() after the
tests have completed. This execution is not counted for timing
purposes.
o --pre-query=value The file or string containing the statement to
execute before running the tests. This execution is not counted for
timing purposes.
o --pre-system=str The string to execute using system() before
running the tests. This execution is not counted for timing
purposes.
o --print-defaults Print the program name and all options that it
gets from option files.
For additional information about this and other option-file
options, see Section 4.2.2.3, "Command-Line Options that Affect
Option-File Handling".
o --protocol={TCP|SOCKET|PIPE|MEMORY} The transport protocol to use
for connecting to the server. It is useful when the other
connection parameters normally result in use of a protocol other
than the one you want. For details on the permissible values, see
Section 4.2.7, "Connection Transport Protocols".
o --query=value, -q value The file or string containing the SELECT
statement to use for retrieving data.
o --server-public-key-path=file_name The path name to a file in PEM
format containing a client-side copy of the public key required by
the server for RSA key pair-based password exchange. This option
applies to clients that authenticate with the sha256_password or
caching_sha2_password authentication plugin. This option is ignored
for accounts that do not authenticate with one of those plugins. It
is also ignored if RSA-based password exchange is not used, as is
the case when the client connects to the server using a secure
connection.
If --server-public-key-path=file_name is given and specifies a
valid public key file, it takes precedence over
--get-server-public-key.
For sha256_password, this option applies only if MySQL was built
using OpenSSL.
For information about the sha256_password and caching_sha2_password
plugins, see Section 6.4.1.3, "SHA-256 Pluggable Authentication",
and Section 6.4.1.2, "Caching SHA-2 Pluggable Authentication".
o --shared-memory-base-name=name On Windows, the shared-memory name
to use for connections made using shared memory to a local server.
The default value is MYSQL. The shared-memory name is
case-sensitive.
This option applies only if the server was started with the
shared_memory system variable enabled to support shared-memory
connections.
o --silent, -s Silent mode. No output.
o --socket=path, -S path For connections to localhost, the Unix
socket file to use, or, on Windows, the name of the named pipe to
use.
On Windows, this option applies only if the server was started with
the named_pipe system variable enabled to support named-pipe
connections. In addition, the user making the connection must be a
member of the Windows group specified by the
named_pipe_full_access_group system variable.
o --sql-mode=mode Set the SQL mode for the client session.
o --ssl* Options that begin with --ssl specify whether to connect to
the server using encryption and indicate where to find SSL keys and
certificates. See the section called "Command Options for Encrypted
Connections".
o --ssl-fips-mode={OFF|ON|STRICT} Controls whether to enable FIPS
mode on the client side. The --ssl-fips-mode option differs from
other --ssl-xxx options in that it is not used to establish
encrypted connections, but rather to affect which cryptographic
operations to permit. See Section 6.8, "FIPS Support".
These --ssl-fips-mode values are permitted:
o OFF: Disable FIPS mode.
o ON: Enable FIPS mode.
o STRICT: Enable "strict" FIPS mode.
Note
If the OpenSSL FIPS Object Module is not available, the only
permitted value for --ssl-fips-mode is OFF. In this case,
setting --ssl-fips-mode to ON or STRICT causes the client to
produce a warning at startup and to operate in non-FIPS mode.
As of MySQL 8.0.34, this option is deprecated. Expect it to be
removed in a future version of MySQL.
o --tls-ciphersuites=ciphersuite_list The permissible ciphersuites
for encrypted connections that use TLSv1.3. The value is a list of
one or more colon-separated ciphersuite names. The ciphersuites
that can be named for this option depend on the SSL library used to
compile MySQL. For details, see Section 6.3.2, "Encrypted
Connection TLS Protocols and Ciphers".
This option was added in MySQL 8.0.16.
o --tls-version=protocol_list The permissible TLS protocols for
encrypted connections. The value is a list of one or more
comma-separated protocol names. The protocols that can be named for
this option depend on the SSL library used to compile MySQL. For
details, see Section 6.3.2, "Encrypted Connection TLS Protocols and
Ciphers".
o --user=user_name, -u user_name The user name of the MySQL account
to use for connecting to the server.
o --verbose, -v Verbose mode. Print more information about what the
program does. This option can be used multiple times to increase
the amount of information.
o --version, -V Display version information and exit.
o --zstd-compression-level=level The compression level to use for
connections to the server that use the zstd compression algorithm.
The permitted levels are from 1 to 22, with larger values
indicating increasing levels of compression. The default zstd
compression level is 3. The compression level setting has no effect
on connections that do not use zstd compression.
For more information, see Section 4.2.8, "Connection Compression
Control".
This option was added in MySQL 8.0.18.
COPYRIGHT
Copyright (C) 1997, 2023, Oracle and/or its affiliates.
This documentation is free software; you can redistribute it and/or
modify it only under the terms of the GNU General Public License as
published by the Free Software Foundation; version 2 of the License.
This documentation is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License along
with the program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see
http://www.gnu.org/licenses/.
SEE ALSO
For more information, please refer to the MySQL Reference Manual, which
may already be installed locally and which is also available online at
http://dev.mysql.com/doc/.
AUTHOR
Oracle Corporation (http://dev.mysql.com/).
MySQL 8.0 08/31/2023 MYSQLSLAP(1)
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