Drupal 8. Как отключить кэширование отдельных страниц.

Необходимо добавить файл development.services.yml следующего содержания:

# Local development services.
#
# To activate this feature, follow the instructions at the top of the
# 'example.settings.local.php' file, which sits next to this file.
parameters:
  http.response.debug_cacheability_headers: false
services:
  cache.backend.null:
    class: Drupal\Core\Cache\NullBackendFactory

После этого добавить в sites/default/settings.php

if (file_exists($app_root . '/' . $site_path . '/settings.local.php')) {
  include $app_root . '/' . $site_path . '/settings.local.php';
}

Далее открыть settings.local.php и указать:

$settings['container_yamls'][] = DRUPAL_ROOT . '/sites/development.services.yml';

Подробно об этом написано в "Disable Drupal 8 caching during development"

Не забудьте расскомментировать настройку в файле sites/default/settings.local.php:

/**
 * Disable the render cache (this includes the page cache).
 *
 * Note: you should test with the render cache enabled, to ensure the correct
 * cacheability metadata is present. However, in the early stages of
 * development, you may want to disable it.
 *
 * This setting disables the render cache by using the Null cache back-end
 * defined by the development.services.yml file above.
 *
 * Do not use this setting until after the site is installed.
 */
$settings['cache']['bins']['render'] = 'cache.backend.null';

Иначе может не работать.