клиент эмуляции загрузки (load emulation client)
Описание (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. Forces
--protocol=tcp when specified on the command line without
other connection properties.
• --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. Forces
--protocol=socket when specified on the command line without
other connection properties; on Windows, forces
--protocol=pipe.
• --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.
