pt-align
NAME
pt-align - Align output from other tools to columns.
SYNOPSIS
Usage
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
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-align 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-align.
See also “BUGS” for more information on filing bugs and getting help.
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 does not have any command-line options.
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
COPYRIGHT, LICENSE, AND WARRANTY
This program is copyright 2011-2013 Percona Ireland Ltd,
2010-2011 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.
