Clear Cache Hook System is a way for one piece of code to clear cache.

Thanks to this hook system, many plugins and themes can work in harmony with WP Fastest Cache. Plugins and themes can clear the entire cache using this hook system when the cache needs to be cleared.

However, sometimes any plugin or theme can unnecessarily clear the cache continuously and this causes a lot of CPU usage. You can turn the Clear Cache Hook system off as below and have the cache serve only via php.

You need to add the following lines after <?php which exists at the top of wp-config.php file.