diff --git a/scripts/nagios_push_checker.pl b/scripts/nagios_push_checker.pl
new file mode 100755
index 0000000000..109f794d72
--- /dev/null
+++ b/scripts/nagios_push_checker.pl
@@ -0,0 +1,83 @@
+#!/usr/bin/perl
+
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+# This Source Code Form is "Incompatible With Secondary Licenses", as
+# defined by the Mozilla Public License, v. 2.0.
+
+use strict;
+use warnings;
+
+use FindBin qw($RealBin);
+use lib ("$RealBin/..", "$RealBin/../lib");
+
+use Bugzilla;
+use Bugzilla::Constants;
+use Bugzilla::Product;
+use Bugzilla::User;
+use Getopt::Long;
+
+Bugzilla->usage_mode(USAGE_MODE_CMDLINE);
+
+my $config = {
+    connector => '',
+    warn      => 5,
+    alarm     => 10,
+};
+
+my $usage = <<EOF;
+DESCRIPTION
+
+  this script is called by nagios to warn/alarm when a push connector is
+  backlogged.
+
+SYNTAX
+
+  --connector  (required) connector's name (eg. ReviewBoard)
+  --warn       (optional) number of messages that trigger a warning (def: 5)
+  --alarm      (optional) number of messages that trigger an alarm (def: 10)
+
+EXAMPLES
+
+  nagios_push_checker.pl --connector ReviewBoard
+  nagios_push_checker.pl --connector TCL --warn 25 --alarm 50
+EOF
+
+die($usage) unless GetOptions(
+    'connector=s' => \$config->{connector},
+    'warn=i'      => \$config->{warn},
+    'alarm=i'     => \$config->{alarm},
+    'help|?'      => \$config->{help},
+);
+die $usage if $config->{help} || !$config->{connector};
+
+#
+
+use constant NAGIOS_OK          => 0;
+use constant NAGIOS_WARNING     => 1;
+use constant NAGIOS_CRITICAL    => 2;
+use constant NAGIOS_NAMES       => [qw( OK WARNING CRITICAL )];
+
+my $dbh = Bugzilla->switch_to_shadow_db;
+
+my ($count) = $dbh->selectrow_array(
+    "SELECT COUNT(*) FROM push_backlog WHERE connector=?",
+    undef,
+    $config->{connector},
+);
+
+my $state;
+if ($count >= $config->{alarm}) {
+    $state = NAGIOS_CRITICAL;
+} elsif ($count >= $config->{warn}) {
+    $state = NAGIOS_WARNING;
+} else {
+    $state = NAGIOS_OK;
+}
+
+print "push ", NAGIOS_NAMES->[$state], ": ", $count, " ",
+      "push.", $config->{connector}, " message",
+      ($count == 1 ? '' : 's'), " in backlog\n";
+exit $state;