pt-mext¶

NAME¶

pt-mext - Look at many samples of MySQL SHOW GLOBAL STATUS side-by-side.

SYNOPSIS¶

Usage¶

pt-mext [OPTIONS] -- COMMAND

pt-mext columnizes repeated output from a program like mysqladmin extended.

Get output from mysqladmin:

pt-mext -r -- mysqladmin ext -i10 -c3

Get output from a file:

pt-mext -r -- cat mysqladmin-output.txt

RISKS¶

Percona Toolkit is mature, proven in the real world, and well tested, but all database tools can pose a risk to the system and the database server. Before using this tool, please:

Read the tool’s documentation
Review the tool’s known “BUGS”
Test the tool on a non-production server
Backup your production server and verify the backups

DESCRIPTION¶

pt-mext executes the COMMAND you specify, and reads through the result one line at a time. It places each line into a temporary file. When it finds a blank line, it assumes that a new sample of SHOW GLOBAL STATUS is starting, and it creates a new temporary file. At the end of this process, it has a number of temporary files. It joins the temporary files together side-by-side and prints the result. If --relative option is given, it first subtracts each sample from the one after it before printing results.

OPTIONS¶

--help¶: Show help and exit.

--relative¶

short form: -r

Subtract each column from the previous column.

--version¶: Show version and exit.

ENVIRONMENT¶

This tool does not use any environment variables.

SYSTEM REQUIREMENTS¶

This tool requires the Bourne shell (/bin/sh) and the seq program.

BUGS¶

For a list of known bugs, see https://jira.percona.com/projects/PT/issues.

Please report bugs at https://jira.percona.com/projects/PT. Include the following information in your bug report:

Complete command-line used to run the tool
Tool --version
MySQL version of all servers involved
Output from the tool including STDERR
Input files (log/dump/config files, etc.)

If possible, include debugging output by running the tool with PTDEBUG; see “ENVIRONMENT”.

ATTENTION¶

Using <PTDEBUG> might expose passwords. When debug is enabled, all command line parameters are shown in the output.

DOWNLOADING¶

Visit http://www.percona.com/software/percona-toolkit/ to download the latest release of Percona Toolkit. Or, get the latest release from the command line:

wget percona.com/get/percona-toolkit.tar.gz

wget percona.com/get/percona-toolkit.rpm

wget percona.com/get/percona-toolkit.deb

You can also get individual tools from the latest release:

wget percona.com/get/TOOL

Replace TOOL with the name of any tool.

AUTHORS¶

Baron Schwartz

ABOUT PERCONA TOOLKIT¶

This tool is part of Percona Toolkit, a collection of advanced command-line tools for MySQL developed by Percona. Percona Toolkit was forked from two projects in June, 2011: Maatkit and Aspersa. Those projects were created by Baron Schwartz and primarily developed by him and Daniel Nichter. Visit http://www.percona.com/software/ to learn about other free, open-source software from Percona.

COPYRIGHT, LICENSE, AND WARRANTY¶

THIS PROGRAM IS PROVIDED “AS IS” AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2; OR the Perl Artistic License. On UNIX and similar systems, you can issue `man perlgpl’ or `man perlartistic’ to read these licenses.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

VERSION¶

pt-mext 3.6.0