pt-sift

NAME

pt-sift - Browses files created by pt-collect.

SYNOPSIS

Usage: pt-sift FILE|PREFIX|DIRECTORY

pt-sift browses the files created by pt-collect. If you specify a FILE or PREFIX, it browses only files with that prefix. If you specify a DIRECTORY, then it browses all files within that directory.

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-sift 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-sift.

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

DESCRIPTION

pt-sift downloads other tools that it might need, such as pt-diskstats, and then makes a list of the unique timestamp prefixes of all the files in the directory, as written by the pt-collect tool. If the user specified a timestamp on the command line, then it begins with that sample of data; otherwise it begins by showing a list of the timestamps and prompting for a selection. Thereafter, it displays a summary of the selected sample, and the user can navigate and inspect with keystrokes. The keystroke commands you can use are as follows:

d

Sets the action to start the pt-diskstats tool on the sample’s disk performance statistics.

i

Sets the action to view the first INNODB STATUS sample in less.

m

Displays the first 4 samples of SHOW STATUS counters side by side with the pt-mext tool.

n

Summarizes the first sample of netstat data in two ways: by originating host, and by connection state.

j

Select the next timestamp as the active sample.

k

Select the previous timestamp as the active sample.

q

Quit the program.

1

Sets the action for each sample to the default, which is to view a summary of the sample.

0

Sets the action to just list the files in the sample.

*

Sets the action to view all of the samples’s files in the less program.

OPTIONS

This tool does not have any command-line options.

ENVIRONMENT

This tool does not use any environment variables.

SYSTEM REQUIREMENTS

This tool requires Bash v3 and the following programs: pt-diskstats, pt-pmp, pt-mext, and align (from Aspersa). If these programs are not in your PATH, they will be fetched from the Internet if curl is available.

BUGS

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

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-sift 1.0.2

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