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

The following section is included to inform users about the potential risks, whether known or unknown, of using this tool. The two main categories of risks are those created by the nature of the tool (e.g. read-only tools vs. read-write tools) and those created by bugs.

pt-mext is a read-only tool. It should be very low-risk.

At the time of this release, we know of no bugs that could cause serious harm to users.

The authoritative source for updated information is always the online issue tracking system. Issues that affect this tool will be marked as such. You can see a list of such issues at the following URL: http://www.percona.com/bugs/pt-mext.

See also “BUGS” for more information on filing bugs and getting help.

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 the “-r” option is given, it first subtracts each sample from the one after it before printing results.

OPTIONS

-r Relative: subtract each column from the previous column.

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://bugs.launchpad.net/percona-toolkit. 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 developed by Percona for MySQL support and consulting. Percona Toolkit was forked from two projects in June, 2011: Maatkit and Aspersa. Those projects were created by Baron Schwartz and developed primarily by him and Daniel Nichter, both of whom are employed by Percona. Visit http://www.percona.com/software/ for more software developed by Percona.

VERSION

pt-mext 1.0.2

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© Copyright 2011, Percona Inc.
Except where otherwise noted, this documentation is licensed under the following license:
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This documentation is developed in Launchpad as part of the Percona Toolkit source code.
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