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