MAN page from Other MySQL-client-community-5.1.72-1.sles10.x86_64.rpm
Section: MySQL Database System (1)
mysqlslap - load emulation client
- mysqlslap [options]
mysqlslapis 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.mysqlslapis available as of MySQL 5.1.4.
shell> mysqlslap [options]
Some options such as--createor--queryenable 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--delimiteroption 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;mysqlslapdoes not understand them.
mysqlslapruns 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.
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
Letmysqlslapbuild the query SQL statement with a table of twoINTcolumns and threeVARCHARcolumns. 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 thecreate.sqlfile has multiple table creation statements delimited by';'and multiple insert statements delimited by';'. The--queryfile 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=";"
mysqlslapsupports the following options, which can be specified on the command line or in the[mysqlslap]and[client]groups of an option file.mysqlslapalso supports the options for processing option files described atSection 18.104.22.168, lqCommand-Line Options that Affect Option-File Handlingrq.
Display a help message and exit.
Generate SQL statements automatically when they are not supplied in files or using command options.
Add anAUTO_INCREMENTcolumn to automatically generated tables. This option was added in MySQL 5.1.18.
Specify how many queries to generate automatically. This option was added in MySQL 5.1.18.
Add a GUID-based primary key to automatically generated tables. This option was added in MySQL 5.1.18.
Specify the test load type. The permissible values areread(scan tables),write(insert into tables),key(read primary keys),update(update primary keys), ormixed(half inserts, half scanning selects). The default ismixed. This option was added in MySQL 5.1.16.
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.
How many different queries to generate for automatic tests. For example, if you run akeytest 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.
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.
How many row inserts to perform on each thread. The default is 100. This option was added in MySQL 5.1.16.
How many statements to execute before committing. The default is 0 (no commits are done). This option was added in MySQL 5.1.21.
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 theSELECTstatement.
The file or string containing the statement to use for creating the table.
The schema in which to run the tests. This option was added in MySQL 5.1.5.
If the--auto-generate-sqloption is also given,mysqlslapdrops the schema at the end of the test run. To avoid this, use the--no-dropoption as well.
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.
- *--debug[=debug_options],-# [debug_options]
Write a debugging log. A typicaldebug_optionsstring is'd:t:o,file_name'. The default is'd:t:o,/tmp/mysqlslap.trace'.
Print some debugging information when the program exits. This option was added in MySQL 5.1.21.
Print debugging information and memory and CPU usage statistics when the program exits. This option was added in MySQL 5.1.21.
- *--delimiter=str,-F str
The delimiter to use in SQL statements supplied in files or using command options.
Detach (close and reopen) each connection after eachNstatements. The default is 0 (connections are not detached). This option was added in MySQL 5.1.21.
- *--engine=engine_name,-e engine_name
The storage engine to use for creating tables.
- *--host=host_name,-h host_name
Connect to the MySQL server on the given host.
- *--iterations=N,-i N
The number of times to run the tests.
The directory to use for storing locks. This option was added in MySQL 5.1.5 and removed in 5.1.18.
Preventmysqlslapfrom dropping any schema it creates during the test run. This option was added in MySQL 5.1.57.
- *--number-char-cols=N,-x N
The number ofVARCHARcolumns to use if--auto-generate-sqlis specified.
- *--number-int-cols=N,-y N
The number ofINTcolumns to use if--auto-generate-sqlis specified.
Limit each client to approximately this many queries. Query counting takes into account the statement delimiter. For example, if you invokemysqlslapas 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.
Do not connect to databases.mysqlslaponly prints what it would have done. This option was added in MySQL 5.1.5.
The password to use when connecting to the server. If you use the short option form (-p), youcannothave a space between the option and the password. If you omit thepasswordvalue following the--passwordor-poption on the command line,mysqlslapprompts for one.
Specifying a password on the command line should be considered insecure. SeeSection 22.214.171.124, lqEnd-User Guidelines for Password Securityrq. You can use an option file to avoid giving the password on the command line.
On Windows, connect to the server using a named pipe. This option applies only if the server supports named-pipe connections.
- *--port=port_num,-P port_num
The TCP/IP port number to use for the connection.
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.
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.
The string to execute usingsystem()after the tests have completed. This execution is not counted for timing purposes. This option was added in MySQL 5.1.21.
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.
The string to execute usingsystem()before running the tests. This execution is not counted for timing purposes. This option was added in MySQL 5.1.21.
Preserve the schema from themysqlslaprun. The--auto-generate-sqland--createoptions disable this option. This option was added in MySQL 5.1.5 and removed in MySQL 5.1.23.
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, seeSection 4.2.2, lqConnecting to the MySQL Serverrq.
- *--query=value,-q value
The file or string containing theSELECTstatement to use for retrieving data.
Silent mode. No output.
Follow master locks for othermysqlslapclients. Use this option if you are trying to synchronize around one master server with--lock-directoryplus NFS. This option was added in MySQL 5.1.5 and removed in 5.1.18.
- *--socket=path,-S path
For connections tolocalhost, the Unix socket file to use, or, on Windows, the name of the named pipe to use.
Options that begin with--sslspecify whether to connect to the server using SSL and indicate where to find SSL keys and certificates. SeeSection 126.96.36.199, lqSSL Command Optionsrq.
On Unix, the default is to usefork()calls and this option causespthreadcalls to be used instead. (On Windows, the default is to usepthreadcalls and the option has no effect.) This option was added in MySQL 5.1.6 and removed in 5.1.18.
- *--user=user_name,-u user_name
The MySQL user name to use when connecting to the server.
Verbose mode. Print more information about what the program does. This option can be used multiple times to increase the amount of information.
Display version information and exit.
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SEE ALSOFor more information, please refer to the MySQL Reference Manual,which may already be installed locally and which is also availableonline at http://dev.mysql.com/doc/.
AUTHOROracle Corporation (http://dev.mysql.com/).
- SEE ALSO
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