This is most likely side effect of your caching plugin. WP stores this information in user’s cookies and tries to read them to fill in the form. However since it happens on server side it needs to output info into a page’s source. So if page is being served from cache it just doesn’t work. … Read more
Your expires value in your CDN settings is likely set to a low number. Your CDN expires header is overriding what is coming from your origin server which is why when you enabled the CDN, you received that message from Pingdom. Try increasing your CDN’s expires value. Also if you’re searching for a reliable CDN … Read more
vmtouch seems like a good tool for the job. Highlights: query how much of a directory is cached query how much of a file is cached (also which pages, graphical representation) load file into cache remove file from cache lock files in cache run as daemon vmtouch manual EDIT: Usage as asked in the question … Read more
Several comments just in case, you probably should check that the PHP version is 5.5 and above before calling the function (or check for its existence, not sure if an equivalent function existed in the original APC under the same name) You priority is too high. You actually want to call it after all other … Read more
In nearly all of the case WP doesn’t participate in serving static files. Its rewrite rules are typically configured to ignore them and let web server handle. Otherwise overhead of firing up PHP engine and WP core for each static request would be incredibly taxing. As such there is no mechanism in WP to deal … Read more
You are 100% correct. It is not a good practice to free up RAM. This is likely an example of cargo cult system administration.
In general no, there is no advantage in having two caching entities in the way of each request. But you should be careful and understand how the caching works. For example cloudflare do not cache your pages in a central repository but each data center has its on cache so in an edge case you … Read more
Ok, after having digged into WP source for a couple of hours, found a workaround. Simply tell wordpress to NOT remove old files. Now files are 100% overwritten and cached files maintained. Code is really simple add_filter(‘upgrader_package_options’, ‘avoid_deletion’, 999); function avoid_deletion($options) { if($options[‘hook_extra’][‘plugin’] == ‘my-plugin/my-plugin.php’) { $options[“clear_destination”] = false; $options[“abort_if_destination_exists”] = false; } return $options; … Read more
No, they can’t. Caching plugins cannot possibly know how plugins and themes work internally. They store whole html pages and detect some changes to determine whether a page needs refreshing. Suppose they would able to analyse all code running and cache every time an object is initiated. Not only would that process itself cost a … Read more
Since the answer is somehow hidden in the question – here is the solution for nginx in a VirtualBox environment as standalone answer. In your nginx config (usally /etc/nginx/nginx.conf) or vhost config file change the sendfile parameter to off: sendfile off; While sendfile is at the heart of Nginx’s fame (blazing-fast low-level static file serving … Read more