Varnish HTTP Purge

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Varnish HTTP Purge sends a request to delete the cached data of a page or post every time it it modified. This happens when updating, publishing, commenting on, or deleting an post, and when changing themes. Varnish is a web application accelerator also known as a caching HTTP reverse proxy. You install it in front of any server that speaks HTTP and configure it to cache the contents. This plugin does not install Varnish for you, nor will it configure Varnish for WordPress. Not all page caches are deleted every time, depending on your Varnish configuration. For example, when a post, page, or custom post type is edited, or a new comment is added, only the following pages will purge: The front page The post/page edited Any categories, tags, and/or custom taxonomies associated with the page Related feeds Associated json API pages In addition, your entire cache will be deleted on the following actions: Changing themes Press the ‘Purge Varnish Cache’ button on the dashboard or toolbar Plugins can hook into the purge actions as well, to filter their own events to trigger a purge. And if you’re into WP-CLI, you can use that too: wp varnish purge On a multisite network using subfolders, only network admins can purge the main site. This is a security decision. Requirements Pretty Permalinks enabled Varnish 3.x or higher