#!/usr/bin/perl
# -*- cperl -*-
#
# Copyright (C) 2012, Clemens Schwaighofer
#
# 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_size_detail_ - Plugin to monitor PostgreSQL database size for one database in detail (data, index, sequence, view)

=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_size_<databasename>.
This script cannot monitor all database detail sizes at the same time, a valid database name needs to be given.

=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) 2012, Clemens Schwaighofer (gullevek@gullevek.org)

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_size_detail_',
    title    => 'PostgreSQL detail database size',
    info     => 'Size of database in detail',
    vlabel   => 'Size',
    paramdatabase => 1,
    basequery => "SELECT CASE WHEN relkind = 'r' OR relkind = 't' THEN 'db_detail_data' WHEN relkind = 'i' THEN 'db_detail_index' WHEN relkind = 'v' THEN 'db_detail_view' WHEN relkind = 'S' THEN 'db_detail_sequence' ELSE 'db_detail_other' END AS state,
	SUM(relpages::bigint * 8 * 1024) AS size
	FROM pg_class pg, pg_namespace pgn WHERE pg.relnamespace = pgn.oid AND pgn.nspname NOT IN ('information_schema', 'pg_catalog') GROUP BY state",
    configquery    => [
        "VALUES ('db_detail_data','Data size'),('db_detail_index','Index size'),('db_detail_sequence','Sequence size'),('db_detail_view','View size'),('db_detail_other','Other size')",
    ],
    suggestquery =>
        "SELECT datname FROM pg_database WHERE datallowconn AND NOT datistemplate AND NOT datname='postgres' UNION ALL SELECT 'ALL' ORDER BY 1 LIMIT 10",
    stack     => 1,
    graphmin  => 0,
    graphdraw => 'AREA',
	extraconfig => 'graph_total Total'
);

$pg->Process();