pt-align

NAME

pt-align - Align output from other tools to columns.

SYNOPSIS

Usage

pt-align [FILES]

pt-align aligns output from other tools to columns. If no FILES are specified, STDIN is read.

If a tool prints the following output,

DATABASE TABLE   ROWS
foo      bar      100
long_db_name table  1
another  long_name 500

then pt-align reprints the output as,

DATABASE     TABLE     ROWS
foo          bar        100
long_db_name table        1
another      long_name  500

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-align reads lines and splits them into words. It counts how many words each line has, and if there is one number that predominates, it assumes this is the number of words in each line. Then it discards all lines that don’t have that many words, and looks at the 2nd line that does. It assumes this is the first non-header line. Based on whether each word looks numeric or not, it decides on column alignment. Finally, it goes through and decides how wide each column should be, and then prints them out.

This is useful for things like aligning the output of vmstat or iostat so it is easier to read.

OPTIONS

This tool accepts additional command-line arguments. Refer to the “SYNOPSIS” and usage information for details.

--help

Show help and exit.

--version

Show version and exit.

ENVIRONMENT

This tool does not use any environment variables.

SYSTEM REQUIREMENTS

You need Perl, and some core packages that ought to be installed in any reasonably new version of Perl.

BUGS

For a list of known bugs, see http://www.percona.com/bugs/pt-align.

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, Brian Fraser, and Daniel Nichter

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.

VERSION

pt-align 2.2.6

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