Title: WP Super Cache plugin "doesn't work" Last modified: August 19, 2016 --- # WP Super Cache plugin "doesn't work" * [dokk2018](https://wordpress.org/support/users/dokk2018/) * (@dokk2018) * [15 years, 9 months ago](https://wordpress.org/support/topic/wp-super-cache-plugin-doesnt-work/) * Hi. I have a problem with CPU load, it’s over the line of 10% permitted on my hosting. So I tryed to swith on caching with WP Super Cache. I activeted WPSC with defaults(then experiment with some parameters) and CPU load not go down, but a little up. It looks like the working of plugin makes load of CPU. * Setting was: -ON WP Cache and Super Cache enabled -Don’t cache pages for known users. (Logged in users and those that comment) -Clear all cache files when a post or page is published. (This may significantly slow down saving of posts.)- Only refresh current page when comments made. -Expire time:7200 seconds * Then I have tryed to reinstall plugin. I’ve done “1” in uninstall.php. But when I clear necessary for WPSC strings from .htaccess works only the main page of my site, all other links goes to page 404, including links from search engines. So I leave this file not clearing. How to clear it? * [http://wordpress.org/extend/plugins/wp-super-cache/](http://wordpress.org/extend/plugins/wp-super-cache/) Viewing 12 replies - 1 through 12 (of 12 total) * Plugin Author [Donncha O Caoimh (a11n)](https://wordpress.org/support/users/donncha/) * (@donncha) * [15 years, 9 months ago](https://wordpress.org/support/topic/wp-super-cache-plugin-doesnt-work/#post-1643884) * You probably removed the WordPress .htaccess rules too. Go to Settings->Permalinks and set them there again if you need to. * I don’t know why the plugin didn’t work. Perhaps you can try the debug system in the plugin (scroll down the admin page and you’ll find it) and use it to figure it out. * Thread Starter [dokk2018](https://wordpress.org/support/users/dokk2018/) * (@dokk2018) * [15 years, 9 months ago](https://wordpress.org/support/topic/wp-super-cache-plugin-doesnt-work/#post-1643901) * “You probably removed the WordPress .htaccess rules too.” – No. “Go to Settings- >Permalinks and set them(what?) there again if you need to.” – Permalinks: /% category%/%postname%/ * Thread Starter [dokk2018](https://wordpress.org/support/users/dokk2018/) * (@dokk2018) * [15 years, 9 months ago](https://wordpress.org/support/topic/wp-super-cache-plugin-doesnt-work/#post-1644038) * Debugging is on. Where is the file with debug info? * Thread Starter [dokk2018](https://wordpress.org/support/users/dokk2018/) * (@dokk2018) * [15 years, 9 months ago](https://wordpress.org/support/topic/wp-super-cache-plugin-doesnt-work/#post-1644043) * E-mail: -In WP Cache Phase 2 -No wp-cache file served as user agent rejected.- USER AGENT (Mozilla/5.0 (compatible; YandexBot/3.0; +http://yandex.com/bots)) rejected. Not Caching -Supercache caching disabled. Only using wp-cache. Non empty GET request. -Setting up WordPress actions -No wp-cache file exists. Must generate a new one. -No closing html tag. Not caching. -Buffer is blank. Output buffer may have been corrupted by another plugin or this is a redirected URL. Look for text ‘ob_start’ in the files of your plugins directory. -Output buffer callback -Setting up WordPress actions -Created output buffer -Supercache caching disabled. Only using wp-cache. Non empty GET request. -supercache dir: /*/*/*/*/*/*/ wp-content/cache/supercache/*/ -In WP Cache Phase 2 -No wp-cache file exists. Must generate a new one. -Setting up WordPress actions -Created output buffer- supercache dir: /*/*/*/*/*/*/wp-content/cache/supercache/*/*/*/ -In WP Cache Phase 2 -Renamed temp supercache file to /*/*/*/*/*/*/wp-content/cache/supercache/*/*/*/ index.html -Writing non-gzipped buffer to supercache file. -supercache dir: /*/*/*/*/*/*/ wp-content/cache/supercache/*/*/*/ -supercache dir: … -Output buffer callback- Anonymous user detected. Only creating Supercache file. -No closing html tag. Not caching. * That’s all for now. * Thread Starter [dokk2018](https://wordpress.org/support/users/dokk2018/) * (@dokk2018) * [15 years, 9 months ago](https://wordpress.org/support/topic/wp-super-cache-plugin-doesnt-work/#post-1644044) * Main page * * Thread Starter [dokk2018](https://wordpress.org/support/users/dokk2018/) * (@dokk2018) * [15 years, 9 months ago](https://wordpress.org/support/topic/wp-super-cache-plugin-doesnt-work/#post-1644045) * Config in plugin admin(points on): -ON WP Cache and Super Cache enabled -Refresh preloaded cache files every 0 minutes. (0 to disable, minimum 30 minutes.) -Many emails, 2 emails per 100 posts. -Expire time: 3600 seconds * Plugin Author [Donncha O Caoimh (a11n)](https://wordpress.org/support/users/donncha/) * (@donncha) * [15 years, 9 months ago](https://wordpress.org/support/topic/wp-super-cache-plugin-doesnt-work/#post-1644047) * These are the important lines: * “No closing html tag. Not caching. -Buffer is blank. Output buffer may have been corrupted by another plugin or this is a redirected URL. Look for text ‘ ob_start’ in the files of your plugins directory.” * The plugin isn’t getting any data to cache unfortunately. As it says, look for the text “ob_start” in the files of your plugins directory. * [mrmist](https://wordpress.org/support/users/mrmist/) * (@mrmist) * [15 years, 9 months ago](https://wordpress.org/support/topic/wp-super-cache-plugin-doesnt-work/#post-1644058) * [**Mod Note:** I’ve deleted a number of large pastes from this thread. If you want to post large blocks of code, please use a [pastebin](http://wordpress.pastebin.ca/) [(Alternate URL)](http://wordpress.pastebin.com/). Thanks!] * Thread Starter [dokk2018](https://wordpress.org/support/users/dokk2018/) * (@dokk2018) * [15 years, 9 months ago](https://wordpress.org/support/topic/wp-super-cache-plugin-doesnt-work/#post-1644060) * So ob_start in plugins: -akismet -platinum-seo-pack -si-contact-form -simple- forum -subscribe-to-comments -wp-insert -wp-super-cache -wp-useronline -yet-another- related-posts-plugin * Thread Starter [dokk2018](https://wordpress.org/support/users/dokk2018/) * (@dokk2018) * [15 years, 9 months ago](https://wordpress.org/support/topic/wp-super-cache-plugin-doesnt-work/#post-1644063) * What should I do? * Thread Starter [dokk2018](https://wordpress.org/support/users/dokk2018/) * (@dokk2018) * [15 years, 9 months ago](https://wordpress.org/support/topic/wp-super-cache-plugin-doesnt-work/#post-1644223) * so? * Plugin Author [Donncha O Caoimh (a11n)](https://wordpress.org/support/users/donncha/) * (@donncha) * [15 years, 9 months ago](https://wordpress.org/support/topic/wp-super-cache-plugin-doesnt-work/#post-1644226) * You’ll have to figure out which plugin is misbehaving. Disable them one by one until caching works again. Viewing 12 replies - 1 through 12 (of 12 total) The topic ‘WP Super Cache plugin "doesn't work"’ is closed to new replies. * ![](https://ps.w.org/wp-super-cache/assets/icon-256x256.png?rev=3506220) * [WP Super Cache](https://wordpress.org/plugins/wp-super-cache/) * [Frequently Asked Questions](https://wordpress.org/plugins/wp-super-cache/#faq) * [Support Threads](https://wordpress.org/support/plugin/wp-super-cache/) * [Active Topics](https://wordpress.org/support/plugin/wp-super-cache/active/) * [Unresolved Topics](https://wordpress.org/support/plugin/wp-super-cache/unresolved/) * [Reviews](https://wordpress.org/support/plugin/wp-super-cache/reviews/) * 12 replies * 3 participants * Last reply from: [Donncha O Caoimh (a11n)](https://wordpress.org/support/users/donncha/) * Last activity: [15 years, 9 months ago](https://wordpress.org/support/topic/wp-super-cache-plugin-doesnt-work/#post-1644226) * Status: not resolved