There are two steps necessary to make sure that the browsers fetch the updated HTML pages (ex: home page). Step 1 Uncheck ‘Set expires header’ at your site’s wp-admin/admin.php?page=w3tc_browsercache#html_xml, for ‘HTML & XML’ files. Whenever a browser sees an Expires header, it (the browser) will fetch the next version of that particular HTML page only … Read more
Template tags rely on global $post (unless you explicitly provide something else to those that support it. So either: they get something from that variable (no reason to go for it in database) or they don’t (then they fail because they have no clue what you want) Under most normal circumstances there is no reason … Read more
Forgot I could go this route: $wpdb->query( “DELETE FROM `$wpdb->options` WHERE `option_name` LIKE (‘_transient_galleries_%’)” );
An advanced object cache is a cache mechanism that can store data that persists beyond a single request. A couple of popular object caches for WordPress are APC and Memcached. The WP_Object_Cache class Codex page has a list of links with more info on advanced cache options.
It’s hard to answer this given that each site is most likely different and each server is also configured differently. If these sites are individual WordPress installs then 1GB /30 sites is normal, an absolute bare minimum per site would be 32MB for apc.shm_size, this equals 960MB with no overhead. 32MB is in my opinion … Read more
Since you already have the “Don’t cache pages for logged in users” option activated, what about selecting cache with validation under Cache Control Policy for “HTML” content? Explanation: Essentially, the “don’t cache pages for logged in users” option should already be sending a no-cache header for your logged users only. If a user has a … Read more
The plugin works fine; alternative you can use a own function to replace the bloginf() to your CDN-Url; Example: replace the url in content: // replace content for CDN if ( !function_exists(‘fb_add_static_content_url’) ) { function fb_add_static_content_url($content) { if ( is_admin() ) // eigentlich überflüssig return $content; $wpurl = get_bloginfo(‘wpurl’); $search = array( $wpurl . ‘/wp-content/images/’, … Read more
Nope, doesn’t work like that. The database-related caching is minimal and mostly covers using precisely same queries during single page load. Best way to cache persistently database and/or computationally intensive results is using Transients API to store results for fitting period of time.
There is no option to do this in the plugin. It is suggested to run page cache garbage collection more frequently on high traffic sites. I expect this would keep the size of cache on disk to a reasonable amount.
It’s a great question, and one I’ve been a little confused by as well. The conclusion I’ve drawn is, it’s expensive to leave cache files for two reasons: If your site (or sites, in the case of a multisite installation) has/have a lot of pages, you can easily end up with thousands of cache files, … Read more