To maximize your site's performance on Pantheon and to take advantage of our Varnish caching, you'll need to configure your site's performance settings.
Learn industry best practices for Drupal caching, how to take advantage of them on the platform, and troubleshooting common issues with help from the experts at Pantheon.
/admin/config/development/performance for Drupal's performance settings.
In Drupal 8, anonymous page caching is enabled by default. There is no option to turn it on or off. To disable caching for development purposes, set the "Page cache maximum age" to no caching.
Page cache maximum age sets the max-age value in the Cache-Control headers that are output by Drupal 8. The only value that will disable Drupal's caching is "no caching". For an in-depth explanation of the max-age header, see the W3.org official documentation.
Other modules like
views.module, which is now in Drupal 8's core, and
panels.module contain their own caching options, which are much more fine-grained than the basic Drupal cache settings. If you use these modules, you should consider implementing their cache settings to provide a good logged-in user experience.