/usr/lib/xymon/client/ext/postgres is in hobbit-plugins 20170219.
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 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 | #!/usr/bin/perl -w
# Plugin for monitor postgres connections.
#
# Copyright (C) 2008 Christoph Berg <myon@debian.org>
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation
# files (the "Software"), to deal in the Software without
# restriction, including without limitation the rights to use,
# copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following
# conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
use strict;
use DBI;
use DBD::Pg;
use Hobbit;
use lib '/usr/share/postgresql-common';
use PgCommon;
my $version = PgCommon::get_newest_version () or die "no postgres version found";
my @clusters = PgCommon::get_version_clusters ($version) or die "no postgres/$version clusters found";
foreach my $cluster (@clusters) {
my $clustername = `hostname -f`;
chomp $clustername;
$clustername =~ s/[^.]*\./$cluster./ if ($cluster ne "main");
my $bb = new Hobbit ({ hostname => $clustername, test => 'postgres',
text => "Connections to cluster $version/$cluster:\n" });
my $socketdir = PgCommon::get_cluster_socketdir ($version, $cluster);
my $port = PgCommon::get_cluster_port ($version, $cluster);
my %dbh;
$dbh{'postgres'} = DBI->connect ("DBI:Pg:dbname=postgres;host=$socketdir;port=$port", "", "",
{RaiseError => 1}) || die;
my $sql = "SELECT datname, count (pg_stat_activity.datname)
FROM pg_database LEFT JOIN pg_stat_activity USING (datname)
WHERE datallowconn AND datname <> 'template1'
GROUP BY datname ORDER BY datname";
my $sth = $dbh{'postgres'}->prepare($sql);
$sth->execute();
my @db = ();
while ( my ($dbname, $curr_conn) = $sth->fetchrow_array ) {
$bb->color_print ('green', "$dbname : $curr_conn\n"); # GAUGE
push @db, $dbname;
}
$bb->send;
foreach my $dbname (@db) {
next if $dbname eq 'postgres';
my $bb = new Hobbit ("bbpostgres"); # dummy to catch connection errors
$dbh{$dbname} = DBI->connect ("DBI:Pg:dbname=$dbname;host=$socketdir;port=$port", "", "",
{RaiseError => 1}) || die "";
}
##############
$bb = new Hobbit ({ hostname => $clustername, test => 'pgtbl',
text => "Table activity on cluster $version/$cluster:\n" }); # DERIVE
foreach my $dbname (@db) {
$bb->print ("\n");
my $sql = "SELECT SUM(n_tup_ins), SUM(n_tup_upd), SUM(n_tup_del)
FROM pg_stat_user_tables";
my $sth = $dbh{$dbname}->prepare($sql);
$sth->execute();
my ($n_tup_ins, $n_tup_upd, $n_tup_del) = $sth->fetchrow();
$bb->color_print ('green', "${dbname}_delete : $n_tup_del\n") if ($n_tup_del);
$bb->color_print ('green', "${dbname}_insert : $n_tup_ins\n") if ($n_tup_ins);
$bb->color_print ('green', "${dbname}_update : $n_tup_upd\n") if ($n_tup_upd);
}
$bb->send;
##############
$bb = new Hobbit ({ hostname => $clustername, test => 'pgtpl',
text => "Tuple reads on cluster $version/$cluster:\n" }); # DERIVE
foreach my $dbname (@db) {
$bb->print ("\n");
my $sql = "SELECT SUM(seq_tup_read), SUM(idx_tup_fetch) FROM pg_stat_user_tables";
my $sth = $dbh{$dbname}->prepare($sql);
$sth->execute();
my ($seq_tup_read,$idx_tup_fetch) = $sth->fetchrow();
$bb->color_print ('green', "${dbname}_idx_fetch : $idx_tup_fetch\n") if ($idx_tup_fetch);
$bb->color_print ('green', "${dbname}_seq_read : $seq_tup_read\n") if ($seq_tup_read);
}
$bb->send;
##############
$bb = new Hobbit ({ hostname => $clustername, test => 'pgscn',
text => "Scans initiated on cluster $version/$cluster:\n" }); # DERIVE
foreach my $dbname (@db) {
$bb->print ("\n");
my $sql = "SELECT SUM(seq_scan), SUM(idx_scan) FROM pg_stat_user_tables";
my $sth = $dbh{$dbname}->prepare($sql);
$sth->execute();
my ($seq_scan,$idx_scan) = $sth->fetchrow();
$bb->color_print ('green', "${dbname}_idx_scan : $idx_scan\n") if ($idx_scan);
$bb->color_print ('green', "${dbname}_seq_scan : $seq_scan\n") if ($seq_scan);
}
$bb->send;
##############
$bb = new Hobbit ({ hostname => $clustername, test => 'pgblk',
text => "Cache blocks on cluster $version/$cluster:\n" }); # DERIVE
foreach my $dbname (@db) {
$bb->print ("\n");
my $sql = "SELECT blks_read, blks_hit FROM pg_stat_database WHERE datname='$dbname'";
my $sth = $dbh{$dbname}->prepare($sql);
$sth->execute();
my ($blks_read,$blks_hit) = $sth->fetchrow();
$bb->color_print ('green', "${dbname}_blks_hit : $blks_hit\n") if ($blks_hit);
$bb->color_print ('green', "${dbname}_blks_read : $blks_read\n") if ($blks_read);
#my $read_hitratio = $blks_read+$blks_hit != 0 ? sprintf "%.2f", ($blks_hit/($blks_read+$blks_hit))*100 : 100;
#$out .= "${dbname}_read_hitratio : $read_hitratio\n"; # GAUGE
}
$bb->send;
##############
$bb = new Hobbit ({ hostname => $clustername, test => 'pgxlg',
text => "Xlog activity on cluster $version/$cluster:\n" }); #DERIVE
foreach my $dbname (@db) {
$bb->print ("\n");
my $sql = "SELECT xact_commit, xact_rollback FROM pg_stat_database WHERE datname='$dbname'";
my $sth = $dbh{$dbname}->prepare($sql);
$sth->execute();
my ($curr_xact_commit,$curr_xact_rollback) = $sth->fetchrow();
$bb->color_print ('green', "${dbname}_commit : $curr_xact_commit\n") if ($curr_xact_commit);
$bb->color_print ('green', "${dbname}_rollback : $curr_xact_rollback\n") if ($curr_xact_rollback);
}
$bb->send;
##############
$bb = new Hobbit ({ hostname => $clustername, test => 'pglck',
text => "Locks on cluster $version/$cluster:\n" }); #GAUGE
foreach my $dbname (@db) {
$bb->print ("\n");
my $sql="SELECT mode, COUNT(mode) FROM pg_locks GROUP BY mode ORDER BY mode";
my $sth = $dbh{$dbname}->prepare ($sql);
$sth->execute ();
my $locks = 0;
my $exlocks = 0;
while (my ($mode, $count) = $sth->fetchrow ()) {
if ($mode =~ /exclusive/i) {
$exlocks = $exlocks + $count;
}
$locks = $locks+$count;
}
$bb->color_print ('green', "${dbname}_exlocks : $exlocks\n") if ($exlocks);
$bb->color_print ('green', "${dbname}_locks : $locks\n") if ($exlocks);
}
$bb->send;
##############
foreach my $dbname (@db) {
$dbh{$dbname}->disconnect;
}
}
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