Munin contributed plugins

#!/usr/bin/perl -w

use strict;

use DBI;

my $dbhost = $ENV{'dbhost'} || '127.0.0.1';

my $dbname = $ENV{'dbname'} || 'template1';

my $dbuser = $ENV{'dbuser'} || 'postgres';

my $dbpass = $ENV{'dbpass'} || '';

if ($ARGV[0] && $ARGV[0] eq "config") {

    print <<EOF;

graph_title Postgres locks

graph_args -l 0 --base 1000

graph_vlabel Locks

graph_category db

graph_info Shows Postgresql locks

locks.label Locks

locks.info Locks (more info here, please... :)

locks.type GAUGE

locks.warning 5

locks.critical 10

exlocks.label Exclusive locks

exlocks.info Exclusive locks (here too, please... :)

exlocks.type GAUGE

exlocks.warning 5

exlocks.critical 10

EOF

} else {

    my $Con = "DBI:Pg:dbname=$dbname;host=$dbhost";

    my $Dbh = DBI->connect ($Con,

                            $dbuser,

			    $dbpass,

			    {RaiseError =>1}) || die "Unable to access Database $dbname on host $dbhost as user $dbuser.\nError returned was: ". $DBI::errstr;

    my $sql="SELECT mode,COUNT(mode) FROM pg_locks GROUP BY mode ORDER BY mode;";

    my $sth = $Dbh->prepare ($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;

    }

    print "locks.value $locks\n";

    print "exlocks.value $exlocks\n";

}