Provided by: mariadb-client-10.1_10.1.29-6ubuntu2_amd64 bug

NAME

       mysqlslap - load emulation client

SYNOPSIS

       mysqlslap [options]

DESCRIPTION

       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.

       Examples:

       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 \
             --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] option file groups.  mysqlslap also supports the options for
       processing option files.

       ·   --help, -?

           Display a help message and exit.

       ·   --auto-generate-sql, -a

           Generate SQL statements automatically when they are not supplied in files or via
           command options.

       ·   --auto-generate-sql-add-autoincrement

           Add an AUTO_INCREMENT column to automatically generated tables.

       ·   --auto-generate-sql-execute-number=N

           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=type

           Specify the test load type. The allowable 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.

       ·   --auto-generate-sql-secondary-indexes=N

           Specify how many secondary indexes to add to automatically generated tables. By
           default, none are added.

       ·   --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.

       ·   --auto-generate-sql-unique-write-number=N

           How many different queries to generate for --auto-generate-sql-write-number. The
           default is 10.

       ·   --auto-generate-sql-write-number=N

           How many row inserts to perform on each thread. The default is 100.

       ·   --commit=N

           How many statements to execute before committing. The default is 0 (no commits are
           done).

       ·   --compress, -C

           Compress all information sent between the client and the server if both support
           compression.

       ·   --concurrency=N, -c N

           The number of clients to simulate when issuing the SELECT statement.

       ·   --create=value

           The file or string containing the statement to use for creating the table.

       ·   --create-schema=value

           The schema in which to run the tests.

       ·   --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.

       ·   --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´.

       ·   --debug-check

           Print some debugging information when the program exits.

       ·   --debug-info, -T

           Print debugging information and memory and CPU usage statistics when the program
           exits.

       ·   --default-auth=name

           Default authentication client-side plugin to use.

       ·   --defaults-extra-file=filename

           Set filename as the file to read default options from after the global defaults files
           has been read.  Must be given as first option.

       ·   --defaults-file=filename

           Set filename as the file to read default options from, override global defaults files.
           Must be given as first option.

       ·   --delimiter=str, -F str

           The delimiter to use in SQL statements supplied in files or via command options.

       ·   --detach=N

           Detach (close and reopen) each connection after each N statements. The default is 0
           (connections are not detached).

       ·   --engine=engine_name, -e 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 colon, for
           example memory:max_row=2300.

       ·   --host=host_name, -h host_name

           Connect to the MariaDB server on the given host.

       ·   --init-command=str

           SQL Command to execute when connecting to MariaDB server. Will automatically be
           re-executed when reconnecting.

       ·   --iterations=N, -i N

           The number of times to run the tests.

       ·   --no-defaults

           Do not read default options from any option file. This must be given as the first
           argument.

       ·   --no-drop

           Do not drop any schema created during the test after the test is complete.

       ·   --number-char-cols=N, -x N

           The number of VARCHAR columns to use if --auto-generate-sql is specified.

       ·   --number-int-cols=N, -y N

           The number of INT columns to use if --auto-generate-sql is specified.

       ·   --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.

               shell> mysqlslap --delimiter=";" --number-of-queries=10
                        --query="use test;insert into t values(null)"

       ·   --only-print

           Do not connect to databases.  mysqlslap only prints what it would have done.

       ·   --password[=password], -p[password]

           The password to use when connecting to the server. If you use the short option form
           (-p), you cannot have a space between the option and the password. If you omit the
           password value following the --password or -p option on the command line, mysqlslap
           prompts for one.

           Specifying a password on the command line should be considered insecure. You can use
           an option file to avoid giving the password on the command line.

       ·   --pipe, -W

           On Windows, connect to the server via a named pipe. This option applies only if the
           server supports named-pipe connections.

       ·   --plugin-dir=dir_name

           Directory for client-side plugins.

       ·   --port=port_num, -P port_num

           The TCP/IP port number to use for the connection.

       ·   --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.

       ·   --post-system=str

           The string to execute via system() after the tests have completed. This execution is
           not counted for timing purposes.

       ·   --pre-query=value

           The file or string containing the statement to execute before running the tests. This
           execution is not counted for timing purposes.

       ·   --pre-system=str

           The string to execute via system() before running the tests. This execution is not
           counted for timing purposes.

       ·   --print-defaults

           Print the program argument list and exit.  This must be given as the first argument.

       ·   --protocol={TCP|SOCKET|PIPE|MEMORY}

           The connection protocol to use for connecting to the server. It is useful when the
           other connection parameters normally would cause a protocol to be used other than the
           one you want.

       ·   --query=value, -q value

           The file or string containing the SELECT statement to use for retrieving data.

       ·   --shared-memory-base-name=name

           On Windows, the shared-memory name to use, for connections made via shared memory to a
           local server. This option applies only if the server supports shared-memory
           connections.

       ·   --silent, -s

           Silent mode. No output.

       ·   --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.

       ·   --ssl

           Enable SSL for connection (automatically enabled with other flags). Disable with
           --skip-ssl.

       ·   --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 (check OpenSSL docs, implies --ssl).

       ·   --ssl-cipher=name

           SSL cipher to use (check OpenSSL docs, implies --ssl).

       ·   --ssl-key=name

           X509 key in PEM format (check OpenSSL docs, implies --ssl).

       ·   --ssl-crl=name

           Certificate revocation list (check OpenSSL docs, implies --ssl).

       ·   --ssl-crlpath=name

           Certificate revocation list path (check OpenSSL docs, 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.

       ·   --user=user_name, -u user_name

           The MariaDB user name to use when connecting to the server.

       ·   --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.

       ·   --version, -V

           Display version information and exit.

COPYRIGHT

       Copyright 2007-2008 MySQL AB, 2008-2010 Sun Microsystems, Inc., 2010-2015 MariaDB
       Foundation

       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 MariaDB Knowledge Base, available online at
       https://mariadb.com/kb/

AUTHOR

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