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Disable Caching in Drupal 8

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The following procedure disables some caching features in Drupal 8 that prevent changes in the site from taking effect immediately. If Drupal is chosen as the user interface, instances where its caching might be undesirable include (1) web-based Supervisory Control and Data Acquisition (SCADA) applications in engineering, and (2) real-time computational reports for scientific telemetry.

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1. In the Drupal folder, open the file that handles the Drupal settings.

sites/default/settings.php

2. Scroll to the bottom of the file and add the lines marked "Drupal8" as follows.

// BEGIN CODE
// ...

// Disable some Drupal caching.
$settings['container_yamls'][] = DRUPAL_ROOT.'/sites/development.services.yml'; //Drupal8
$settings['cache']['bins']['render'] = 'cache.backend.null'; //Drupal8
$settings['cache']['bins']['dynamic_page_cache'] = 'cache.backend.null'; //Drupal8

// END CODE

3. Save the file and reload the page.

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The preceding code can be found in Drupal's "sites/example.settings.local.php" file. The documentation comments in the file also suggests alternative ways to activate these cache-disabling features.

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