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 <http://www.percona.com/bugs/pt-mext>.

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".

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 copyright 2011-2018 Percona LLC and/or its affiliates, 2010 Baron Schwartz.

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 3.2.1