Provided by: percona-toolkit_3.1+dfsg-1.1_all bug

NAME

       pt-fk-error-logger - Log MySQL foreign key errors.

SYNOPSIS

       Usage: pt-fk-error-logger [OPTIONS] [DSN]

       pt-fk-error-logger logs information about foreign key errors on the given DSN.
       Information is printed to "STDOUT", and it can also be saved to a table by specifying
       "--dest".  The tool runs for forever unless "--run-time" or "--iterations" is specified.

       Print foreign key errors on host1:

          pt-fk-error-logger h=host1

       Print foreign key errors on host1 once then exit:

          pt-fk-error-logger h=host1 --iterations 1

       Save foreign key errors on host1 to percona_schema.fke on host2:

         pt-fk-error-logger h=host1 --dest h=host2,D=percona_schema,t=fke

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-fk-error-logger prints or saves the foreign key errors text from "SHOW INNODB STATUS".
       The errors are not parsed or interpreted in any way.  Foreign key errors are uniquely
       identified by their timestamp.  Only new (more recent) errors are printed or saved.

       By default the tool runs forever, checking every "--interval" seconds for new foreign key
       errors.  Specify "--run-time" and/or "--iterations" to limit how long the tool runs.

OUTPUT

       The foreign key error text from "SHOW ENGINE INNODB STATUS" is printed to "STDOUT", unless
       "--quiet" is specified.  Errors and warnings are printed to "STDERR".

OPTIONS

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

       --ask-pass
           Prompt for a password when connecting to MySQL.

       --charset
           short form: -A; type: string

           Default character set.  If the value is utf8, sets Perl's binmode on STDOUT to utf8,
           passes the mysql_enable_utf8 option to DBD::mysql, and runs SET NAMES UTF8 after
           connecting to MySQL.  Any other value sets binmode on STDOUT without the utf8 layer,
           and runs SET NAMES after connecting to MySQL.

       --config
           type: Array

           Read this comma-separated list of config files; if specified, this must be the first
           option on the command line.

       --daemonize
           Fork to the background and detach from the shell.  POSIX operating systems only.

       --database
           short form: -D; type: string

           Connect to this database.

       --defaults-file
           short form: -F; type: string

           Only read mysql options from the given file.  You must give an absolute pathname.

       --dest
           type: DSN

           Save foreign key errors in this table.  The DSN must specify a database (D) and table
           (t).

           Missing DSN values are inherited from the DSN being monitored, so you can omit most
           values if you're saving foreign key errors on the same host.

           The following table is suggested:

            CREATE TABLE foreign_key_errors (
              ts datetime NOT NULL,
              error text NOT NULL,
              PRIMARY KEY (ts)
            )

           The only information saved is the timestamp and the foreign key error text.

       --help
           Show help and exit.

       --host
           short form: -h; type: string

           Connect to host.

       --interval
           type: time; default: 30

           How often to check for foreign key errors.

       --iterations
           type: int

           How many times to check for foreign key errors.  By default, this option is undefined
           which means an infinite number of iterations.  The tool always exits for "--run-time",
           regardless of the value specified for this option.  For example, the tool will exit
           after 1 minute with "--run-time 1m --iterations 4 --interval 30" because 4 iterations
           at 30 second intervals would take 2 minutes, longer than the 1 mintue run-time.

       --log
           type: string

           Print all output to this file when daemonized.

       --password
           short form: -p; type: string

           Password to use when connecting.  If password contains commas they must be escaped
           with a backslash: "exam\,ple"

       --pid
           type: string

           Create the given PID file.  The tool won't start if the PID file already exists and
           the PID it contains is different than the current PID.  However, if the PID file
           exists and the PID it contains is no longer running, the tool will overwrite the PID
           file with the current PID.  The PID file is removed automatically when the tool exits.

       --port
           short form: -P; type: int

           Port number to use for connection.

       --quiet
           Do not print foreign key errors; only print errors and warnings to "STDERR".

       --run-time
           type: time

           How long to run before exiting.  By default, the tool runs forever.

       --set-vars
           type: Array

           Set the MySQL variables in this comma-separated list of "variable=value" pairs.

           By default, the tool sets:

              wait_timeout=10000

           Variables specified on the command line override these defaults.  For example,
           specifying "--set-vars wait_timeout=500" overrides the defaultvalue of 10000.

           The tool prints a warning and continues if a variable cannot be set.

       --socket
           short form: -S; type: string

           Socket file to use for connection.

       --user
           short form: -u; type: string

           User for login if not current user.

       --version
           Show version and exit.

       --[no]version-check
           default: yes

           Check for the latest version of Percona Toolkit, MySQL, and other programs.

           This is a standard "check for updates automatically" feature, with two additional
           features.  First, the tool checks its own version and also the versions of the
           following software: operating system, Percona Monitoring and Management (PMM), MySQL,
           Perl, MySQL driver for Perl (DBD::mysql), and Percona Toolkit. Second, it checks for
           and warns about versions with known problems. For example, MySQL 5.5.25 had a critical
           bug and was re-released as 5.5.25a.

           A secure connection to Percona’s Version Check database server is done to perform
           these checks. Each request is logged by the server, including software version numbers
           and unique ID of the checked system. The ID is generated by the Percona Toolkit
           installation script or when the Version Check database call is done for the first
           time.

           Any updates or known problems are printed to STDOUT before the tool's normal output.
           This feature should never interfere with the normal operation of the tool.

           For more information, visit
           <https://www.percona.com/doc/percona-toolkit/LATEST/version-check.html>.

DSN OPTIONS

       These DSN options are used to create a DSN.  Each option is given like "option=value".
       The options are case-sensitive, so P and p are not the same option.  There cannot be
       whitespace before or after the "=" and if the value contains whitespace it must be quoted.
       DSN options are comma-separated.  See the percona-toolkit manpage for full details.

       •   A

           dsn: charset; copy: yes

           Default character set.

       •   D

           dsn: database; copy: yes

           Default database.

       •   F

           dsn: mysql_read_default_file; copy: yes

           Only read default options from the given file

       •   h

           dsn: host; copy: yes

           Connect to host.

       •   p

           dsn: password; copy: yes

           Password to use when connecting.  If password contains commas they must be escaped
           with a backslash: "exam\,ple"

       •   P

           dsn: port; copy: yes

           Port number to use for connection.

       •   S

           dsn: mysql_socket; copy: yes

           Socket file to use for connection.

       •   t

           Table in which to store foreign key errors.

       •   u

           dsn: user; copy: yes

           User for login if not current user.

ENVIRONMENT

       The environment variable "PTDEBUG" enables verbose debugging output to STDERR.  To enable
       debugging and capture all output to a file, run the tool like:

          PTDEBUG=1 pt-fk-error-logger ... > FILE 2>&1

       Be careful: debugging output is voluminous and can generate several megabytes of output.

SYSTEM REQUIREMENTS

       You need Perl, DBI, DBD::mysql, 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-fk-error-logger>.

       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

       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.

COPYRIGHT, LICENSE, AND WARRANTY

       This program is copyright 2011-2018 Percona LLC and/or its affiliates.

       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-fk-error-logger 3.1.0

POD ERRORS

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