critical_backends = services.select do |svc|
        config[:backend_session_crit_percent] &&
          svc[:svname] == 'BACKEND' &&
          svc[:slim].to_i > 0 && # rubocop:disable Style/NumericPredicate
          (100 * svc[:scur].to_f / svc[:slim].to_f) > config[:backend_session_crit_percent]