How cache works on WooCart
WooCart cache is built for each country and each browser separately. This is to correctly serve multi-language and multi-currency stores without issues. The first load for the country or browser is slower, but every next load is served from the cache. The cache is flushed every hour.
When you are testing on the mywoocart.com subdomain, your store might feel slow if you're the first visitor for the country or browser. When the store is live, this is not an issue since the cache is quickly built by live visitors.
Clearing Site Cache
Clearing Image/CSS CDN Cache
If you changed images or your CSS is not refreshing with regular Flush Cache, you need to Flush CDN Cache as well. Go to Addons > CDN and click the link. Clearing CDN cache can take up to 10 minutes.
Caching Custom Parameters
Tracking parameters in the URL like utm_content, Facebook's fbclid, or Google' gclid bypass cache on regular server configurations. This means that instead of serving the page from cache, a PHP worker is required for every visit. This can cause performance issues if you're running a large FB campaign (or any campaign with tracking parameters).
WooCart does custom caching and serves pages from the cache even if they're loaded with these URL parameters. If you have your own parameters, you'll need to add them on your own.
Add your own custom parameters
Create or upload a file to wp-content named
Add the default tracking parameters:
sorted_querysting_filter_parameter fbclid gclid utm_source utm_medium utm_campaign utm_id utm_content;
To add your own parameter, add it before the
;. If you have more than one, separate them with a space.
Go to WP-CLI and restart PHP workers to apply the changes.
Testing the implementation
To test you can use the command curl under the WP-CLI tab.
$ ▶ curl -I "https://woostoredemo.com/?utm_content=1"
HTTP/2 200 date: Mon, 24 May 2021 08:45:50 GMT content-type: text/html; charset=UTF-8 vary: Accept-Encoding link: <https://woostoredemo.com/wp-json/>; rel="https://api.w.org/" link: <https://woostoredemo.com/wp-json/wp/v2/pages/19>; rel="alternate"; type="application/json" link: <https://woostoredemo.com/>; rel=shortlink x-cache-key: cache:Slovenia::42099b4af021e53fd8fd4e056c2568d7c2e3ffa8:https:HEAD:woostoredemo.com x-cache: MISS x-cache-skip-reason: 000000 x-cache-skip: 0 x-page-speed: WooCart cache-control: max-age=0, no-cache strict-transport-security: max-age=15724800; includeSubDomains
We then do another request where we change the parameter value:
$ ▶ curl -I "https://woostoredemo.com/?utm_content=2"
The response x-cache should now be HIT. This means that the cached version of the page was served and ignored the changed UTM parameter.
Clearing WPML Cache
After publishing staging you need to clear WPML cache with the below WP-CLI command:
wp option delete wpml_language_switcher_template_objects