Hi , I am a newbie to perl with some bash experience.I am trying to get a monitoring script for postgres database.I was able to get the script working with no issues.But I am having problems with output form.Here is the current output that I get.

./check_postgres.pl --buffers_alloc --exclusivelock --activeconn 17212root@host:

which is to be read as 172 for buffers_alloc 1 for exclusivelock and 2 for activeconn.

I would like to have my output as

./check_postgres.pl --buffers_alloc --exclusivelock --activeconn ------

Buffers_Alloc:172 Exclusive_lock:1 Active_Conn:2

root@host:

That is Description:Value Description:Value followed by next line at the end. I am trying to fix this from past three days but not able to succeed.Any help is greatly appreciated.I need to get this working as soon as possible. 
#!/usr/bin/perl

use strict;
use DBI;
use Getopt::Long;
use Sys::Hostname;

my $database = 'atloffice';
my $user = 'postgres';
my $hostname = '10.28.128.143';

my %querys = (
# State
    "activeconn"        =>      qq{SELECT SUM(numbackends) FROM pg_sta
+t_database},
# Locks
    "exclusivelock"             =>      qq{SELECT COUNT(*) FROM pg_loc
+ks WHERE mode='ExclusiveLock'},
# Checkpoints
    "buffers_alloc"             =>      qq{SELECT buffers_alloc FROM p
+g_stat_bgwriter},
);

GetOptions(
    'help!' => \&usage,
    'user=s' => \$user,
    'database=s' => \$database,

    'activeconn' => sub { print query_database($querys{activeconn}) },
    'exclusivelock' => sub { print query_database($querys{exclusiveloc
+k}) },
    'buffers_alloc' => sub { print query_database($querys{buffers_allo
+c}) }
) or die "$0: try --help for more information\n";

sub query_database {
        my $query = shift(@_);
        my $dbh = DBI->connect("dbi:Pg:dbname=$database;host=$hostname
+",$user);
        my $sth = $dbh->prepare("$query") or die $|;
        $sth->execute;

        while (my @array = $sth->fetchrow_array)  {
                return @array[0];
        }
}

sub usage {
    print "[-] $0 script to  monitor PostgreSQL databases,\n";
    print "Usage: $0 [--OPTION]\n";

    while ( my($key, undef) = each %querys ) {
        print "\t--".$key."\n";
    }

    exit 0
}

if (!$ARGV) { usage }

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In reply to Print subroutine problem by Shivaramakrishnan

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