---
title: "Drupal: Pantheon Cookies"
url: "https://michalak.world/posts/drupal-pantheon-cookies/"
description: "Drupal 8 Performance Tuning"
summary: "Pantheon cookie restrictions."
date: 2019-05-03
lastmod: 2026-08-19
tags: ["Drupal","Performance","Google","Update","Drupal 8","Drupal Commmerce","Drupal Development"]
section: "posts"
author: "Michael Michalak"
site: "https://michalak.world/"
---

# Drupal: Pantheon Cookies

Drupal 8 Performance Tuning

I've been using the commerce_currency_resolver module and it has been fantastic to use.   One issue I ran into was with how the cookies are handled on Pantheon.

When using custom cookies a special naming convention must be used.  The cookie's name must start with STYXKEY.

Per Pantheon: 

Respond to a request with cached content depending on the presence and value of a particular cookie. It's important to note that in order for the response to be cached by Pantheon's edge, the cookie name must match STYXKEY[a-zA-Z0-9_-]+.

Pantheon Documentation: https://pantheon.io/docs/cookies/