MYSQLSLAP(1)                                          MySQL Database System                                         MYSQLSLAP(1)



NAME
       mysqlslap - 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.  mysqlslap is available as of MySQL 5.1.4.

       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]
       groups of an option file.  mysqlslap also supports the options for processing option files described at
       Section 4.2.3.3.1, "Command-Line Options that Affect Option-File Handling".

       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. This option was added in MySQL 5.1.18.

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

           Specify how many queries to generate automatically. This option was added in MySQL 5.1.18.

       o   --auto-generate-sql-guid-primary

           Add a GUID-based primary key to automatically generated tables. This option was added in MySQL 5.1.18.

       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.
           This option was added in MySQL 5.1.16.

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

           Specify how many secondary indexes to add to automatically generated tables. By default, none are added. This option
           was added in MySQL 5.1.18.

       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. This option was added in MySQL 5.1.18.

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

           How many different queries to generate for --auto-generate-sql-write-number. The default is 10. This option was added
           in MySQL 5.1.18.

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

           How many row inserts to perform on each thread. The default is 100. This option was added in MySQL 5.1.16.

       o   --commit=N

           How many statements to execute before committing. The default is 0 (no commits are done). This option was added in
           MySQL 5.1.21.

       o   --compress, -C

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

       o   --concurrency=N, -c N

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

       o   --create=value

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

       o   --create-and-drop-schema=value

           The schema in which to run the tests.  mysqlslap drops the schema at the end of the test run. This option was added
           in MySQL 5.1.57.

       o   --create-schema=value

           The schema in which to run the tests. This option was added in MySQL 5.1.5.

               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 --create-and-drop-schema option instead.

       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. This option was added in MySQL 5.1.5.

       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'.

       o   --debug-check

           Print some debugging information when the program exits. This option was added in MySQL 5.1.21.

       o   --debug-info, -T

           Print debugging information and memory and CPU usage statistics when the program exits. This option was added in
           MySQL 5.1.21.

       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).
           This option was added in MySQL 5.1.21.

       o   --engine=engine_name, -e engine_name

           The storage engine to use for creating tables.

       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   --lock-directory=path

           The directory to use for storing locks. This option was added in MySQL 5.1.5 and removed in 5.1.18.

       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.

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

           This option was added in MySQL 5.1.5.

       o   --only-print

           Do not connect to databases.  mysqlslap only prints what it would have done. This option was added in MySQL 5.1.5.

       o   --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. See Section 5.3.2.2, "End-User Guidelines
           for Password Security". You can use an option file to avoid giving the password on the command line.

       o   --pipe, -W

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

       o   --port=port_num, -P port_num

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

       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. This option was added in MySQL 5.1.18.

       o   --shared-memory-base-name=name

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

       o   --post-system=str

           The string to execute using system() after the tests have completed. This execution is not counted for timing
           purposes. This option was added in MySQL 5.1.21.

       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. This option was added in MySQL 5.1.18.

       o   --pre-system=str

           The string to execute using system() before running the tests. This execution is not counted for timing purposes.
           This option was added in MySQL 5.1.21.

       o   --preserve-schema

           Preserve the schema from the mysqlslap run. The --auto-generate-sql and --create options disable this option. This
           option was added in MySQL 5.1.5 and removed in MySQL 5.1.23.

       o   --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. For details on the permissible values, see
           Section 4.2.2, "Connecting to the MySQL Server".

       o   --query=value, -q value

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

       o   --silent, -s

           Silent mode. No output.

       o   --slave

           Follow master locks for other mysqlslap clients. Use this option if you are trying to synchronize around one master
           server with --lock-directory plus NFS. This option was added in MySQL 5.1.5 and removed in 5.1.18.

       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.

       o   --ssl*

           Options that begin with --ssl specify whether to connect to the server using SSL and indicate where to find SSL keys
           and certificates. See Section 5.5.6.3, "SSL Command Options".

       o   --use-threads

           On Unix, the default is to use fork() calls and this option causes pthread calls to be used instead. (On Windows, the
           default is to use pthread calls and the option has no effect.) This option was added in MySQL 5.1.6 and removed in
           5.1.18.

       o   --user=user_name, -u user_name

           The MySQL user name to use when 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.

COPYRIGHT
       Copyright (C) 1997, 2011, Oracle and/or its affiliates. All rights reserved.

       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 5.1                                                  10/26/2011                                               MYSQLSLAP(1)