my $slavehash = $self->{handle}->selectrow_hashref(q{
            SHOW SLAVE STATUS
        });
    if ((! defined $slavehash->{Seconds_Behind_Master}) &&
        (lc $slavehash->{Slave_IO_Running} eq 'no')) {
      $self->add_nagios_critical(
          "unable to get slave lag, because io thread is not running");
    } elsif (! defined $slavehash->{Seconds_Behind_Master}) {
      $self->add_nagios_critical(sprintf "unable to get replication info%s",
          $self->{handle}->{errstr} ? $self->{handle}->{errstr} : "");
    } else {
      $self->{seconds_behind_master} = $slavehash->{Seconds_Behind_Master};
    }