What can and cannot be cached?
First, let’s define what a static asset is. A static asset is an element of your WordPress site that everyone who visits your site sees: HTML, CSS, and JavaScript. Static assets are the same for every visitor, so they can be cached. Dynamic content that changes for each user cannot be cached.Does the CDN cache modify my content?
No. The CDN will never modify your content. If you are seeing issues with HTML, CSS, or JavaScript not working properly, and you’ve cleared the caches, you can be sure that this is not a CDN issue but instead may be an issue with a caching plugin.What is cached and where?
The CDN has over 280 POPs (Points of Presence) around the globe. This network of POPs each has its own cache. Each location can share its cache with other locations for added speed. But, if the requested data is not cached at all, then it is retrieved from the origin: our servers. The only cached assets are:- HTML
- CSS
- JavaScript
- Image files
How does the CDN know when to purge its cache?
Whenever WordPress issues a cache flush, the CDN cache mu-plugin (Must-Use plugin) that we install on your site issues an API call to the CDN to clear the cache of all pages. You can also clear the cache manually. For information about how to do this, go to Manually purging the CDN cache on Mochahost Managed WordPress.Are images modified by the CDN?
Unless an image is optimized by Cloudflare Polish, it’s unmodified. And, even if an image is converted to the WebP format, this is only reflected in the HTTP headers. The file name and the HTML that loads it are still unmodified. For more information about Cloudflare Polish and image optimization, go to Do I need to use an image optimization plugin or CDN on Mochahost Managed WordPress.Common non-CDN issues
- Pages not updating.
- CSS not updating.
- Blank page for some pages.