Comet Cache Pro

Reuse eligible WordPress output

Comet Cache Pro saves snapshots of supported pages, posts, categories, links, archives, and feeds. When caching is enabled and a request qualifies, it can serve an existing cache file instead of repeating database connections and PHP processing. Options in the WordPress dashboard control cache behavior and expiration.

By default, cached pages are not served to logged-in customers or recent commenters. Administrative and login pages, POST, PUT, and DELETE requests, GET requests with query strings, and CLI processes are also excluded. Pro adds an option to cache logged-in users, which can fit membership websites. Query-string options determine which URLs are eligible.

Set cache rules and clearing permissions

Configure automatic and intelligent clearing for posts, pages, custom post types, categories, tags, links, themes, users, archives, feeds, and other supported content. Pro can clear a specified list of custom URLs and run custom PHP code when the cache is cleared. You can grant clearing permissions by role or capability, import and export configuration files, set a dynamic version salt, and control the admin-bar Clear Cache button and related dashboard notifications.

Additional settings include client-side caching, automatic cache expiration, caching for 404 requests, and RSS, RDF, and Atom feed caching. URI, visitor-agent, and HTTP referrer exclusion patterns support wildcards. You can configure whether URLs with query strings are cached.

Monitor cache and server activity

Cache Statistics and charts cover the page cache, HTML Compressor cache, PHP OPCache, and server health. Server Load Monitoring can pause cache regeneration when the server's load average exceeds a configured maximum.

Apache Optimization options can configure GZIP compression, browser caching, and canonical URLs. GZIP compression runs at the web-server level. Mobile Mode supports multiple cache versions for adaptive designs, while Multisite Host Exclusion Patterns let you exclude selected child blogs. The plugin also supports WP-CLI, ManageWP, and InfiniteWP, and includes an automatic updater for Comet Cache Pro.

Install and enable the plugin

Comet Cache Pro is self-contained and does not require Comet Cache Lite. If Lite is installed, deactivate and delete it first. In WordPress, open Dashboard > Plugins > Add New, select Upload Plugin, select the Pro ZIP file, and install it. Activate the plugin, then go to Dashboard > Comet Cache > Plugin Options > Enable/Disable and enable caching. The listed requirements are PHP 5.4+ and Apache 2.1+.