/usr/share/munin/plugins/postgres_oldest_prepared_xact_ is in munin-plugins-core 2.0.25-1+deb8u3.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 | #!/usr/bin/perl
# -*- cperl -*-
#
# Copyright (C) 2010 Magnus Hagander, Redpill Linpro AB
#
# 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 dated June,
# 1991.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# 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., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA.
=head1 NAME
postgres_oldest_prepared_xact_ - Plugin to monitor age of the oldest
prepared transaction in PostgreSQL.
=head1 CONFIGURATION
Configuration is done through libpq environment variables, for example
PGUSER, PGDATABASE, etc. For more information, see L<Munin::Plugin::Pgsql>.
To monitor a specific database, link to postgres_oldest_prepared_xact_<databasename>.
To monitor all databases, link to postgres_oldest_prepared_xact_ALL.
=head1 SEE ALSO
L<Munin::Plugin::Pgsql>
=head1 MAGIC MARKERS
#%# family=auto
#%# capabilities=autoconf suggest
=head1 AUTHOR
Magnus Hagander <magnus@hagander.net>, Redpill Linpro AB
=head1 COPYRIGHT/License.
Copyright (c) 2010 Magnus Hagander, Redpill Linpro AB
All rights reserved. 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
dated June, 1991.
=cut
use strict;
use warnings;
use Munin::Plugin::Pgsql;
my $pg = Munin::Plugin::Pgsql->new(
basename => 'postgres_oldest_prepared_xact_',
title => 'PostgreSQL oldest prepared transaction',
info => 'Prepared transaction age',
vlabel => 'Age (seconds)',
minversion => '8.1',
basequery =>
"SELECT database, COALESCE(max(extract(epoch FROM CURRENT_TIMESTAMP-prepared)),0) FROM pg_prepared_xacts JOIN pg_database ON datname=database %%FILTER%% GROUP BY database ORDER BY 1",
wildcardfilter => "WHERE datname=?",
configquery =>
"SELECT datname,datname FROM pg_database %%FILTER%% ORDER BY 1",
suggestquery => "SELECT 'ALL'",
autoconfquery =>
"SELECT (setting::integer > 0),'Prepared transactions not enabled' FROM pg_settings WHERE name='max_prepared_transactions'",
);
$pg->Process();
exit(0);
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