A cache is a component that transparently stores data so that future requests for that data can be served faster. The data that is stored within a cache might be values that have been computed earlier or duplicates of original values that are stored elsewhere.

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Debug Performance Issues

I've had a WordPress blog I've hosted on Dream Host for several years now. Recently (the past year) my site is going down often. Via Dream Host I found that I'm using up my CPU limit and they are ...
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2answers
65 views

Session alternative for plugins (due to caching)

I'm building a plugin that picks a random post from the database and delivers the result dynamically to the user. For certain aspects I need to know the post ID that's been randomly selected. Session ...
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1answer
83 views

W3 Total Cache plugin integration

I am working on a plugin (widget) that is using some transients that are updated from time to time. That said, when these transients are updated, I think I will need to flush the cache to display the ...
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1answer
297 views

How to optimize 'select found_rows()' query? Several 'high load average' alerts daily

I have 5,000 regular posts, 6,000 posts in one post type and 2,000 posts in another post type. Needless to say, that has made the wp_posts table quite large. Not to mention, I have custom taxonomies ...
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1answer
547 views

Some custom taxonomy child terms not showing in admin. Caching problem?

I have a problem with some custom taxonomy terms. I am using "Types" plugin for creating custom post types and custom taxonomies. I successfully created my postype and hierarchical taxonomy and ...
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1answer
242 views

w3 total cache and sitemap.xml

I have been installing lately w3 total cache on my wordpress site and today webmaster tools has been mailing an error by sitemap.xml crawling. Sitemap ist HTML. Is anybody experienced this issue with ...
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1answer
26 views

Server Variables not recognized in certain posts

I've got a very strange issue that I've never seen in WordPress. I've just converted a big site over to a new responsive theme. The site has about 1,400 articles and there are ads on it. The way we ...
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1answer
37 views

WordPress aggressively caching CSS

I’m absolutely fed up at this stage. I just activated a new theme on my WordPress site. I activated it at about 7pm GMT and since then I’ve been trying to change the style. I’ve updated the CSS (I’m ...
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1answer
25 views

Is MySQL query cache useful for WordPress?

Starting from MySQL 5.6, if you use InnoDB as the default engine, the query cache is now officially disabled. We've a quite moderate traffic WordPress site and experience a major downtime when we ...
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1answer
33 views

Browser Cache causes 'Orderby=rand' to return the same posts

I have a code that redirects users to a random post whenever they visit the homepage: if (have_posts()) { query_posts('orderby=rand'); while (have_posts()) { the_post(); ...
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1answer
235 views

Failing to open advanced-cache.php which is breaking Media Library

On my WordPress install, which is 3.8 and has all plugins updated, it is using Magic Fields 2 and Hypercache amongst other plugins. I can't insert images into posts because when I upload, it gives me ...
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25 views

Page updates appear in Preview but not live version?

I have made some changes to a blog page and excluded some categories. However, whenever I view the blog online the excluded posts still appear. But when I got to the blog page and click 'preview' the ...
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1answer
29 views

How to enable Zend Optimiser+ with Batcache

I am using Batcache with APC Object Cache Backend so far. A lot of posts on internet claiming that using Zend Optimizer instead of APC would reduce CPU and memory usage. I could enable Zend ...
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1answer
117 views

How Can I Safely Remove WP-Super Cache without messing my site up?

So apparently some people cannot view my site because they said it only loads the sidebar. This only happens to some people and it only started happening after I installed the w3 super cache. I've ...
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1answer
60 views

Under heavy cache conditions, updating the parent theme don't reflect changes with child theme enabled

I use W3 Total Cache, Cloudflare (and CloudFront for media files). I use a Child Theme to customize specifically for my site while maintaining the core theme with the parent theme. Whenever I update ...
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1answer
56 views

Apache extensions for WordPress' working without troubles

I have a new web server at the Hetzner EX60. With this new site I have many problems. First of all I need to say that I have problems with default theme and without any plugins. I tried to resolve ...
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1answer
278 views

Caching-Plugins and Ajax-Page-Parts

I'd love to use »W3 Total Cache« for my Wordpress page. Caching the full page is really fasten up the site. But there is a lot of current community activity and most pages including some "latest ...
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1answer
59 views

Keeping Objects in Memory

I have built a WordPress plugin using classes. Each project class is created for a specific user. I want to do three things: Keep the project object in memory for that user between his or her ...
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1answer
177 views

Pagination in wp query with transient api

I have intergrated wordpress transient system with w3 total cache. Now i can`t to do pagination for this query. <?php $paged1 = ...
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1answer
49 views

WordPress cache feeds

I would like to implement a custom cache for all the feeds in my site. The rss requests are very intensive and I have a big db load. Do anyone know of a good action before running the rss query so I ...
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1answer
49 views

Editing wp-includes/feed.php

I was not understanding why my RSS didn't update, after much wailing and gnashing of teeth I believe I have fixed this to a degree by editing wp-includes/feed.php. I changed this: ...
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0answers
50 views

Cache issues with redis and nginx

I have a problem with the rewrite rules in my nginx config file. I am running wordpress with nginx and redis to cache the site. I can get the redis to cache all pages not a problem, but as I am ...
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0answers
66 views

Index page and random posts needs a forced refresh in order to show new content

I have this weird problem with both on desktop and mobile, which requires a manual refresh in order for the index-page to show new posts. It also appears as if the user is not logged in. Basically, I ...
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62 views

Transients and WP Super Cache?

Is it worth using Transients when running WP Super Cache? We have a website that get's updated 20 times a day with new post, so I set a lot transients for queries that don't reflect those updates. My ...
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0answers
200 views

After having installed APC Object Cache Backend transients stopped working

My understanding is that once you enable the persistent object cache, your transients are no longer stored in wp_options but in the cache. Once I installed Mark Jaquith's APC Object Cache Backend, ...
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0answers
33 views

Caching RSS plugin data

I'm developing plugin and I need it's data to be cached, let's assume that it's large RSS feed grabber. Basically data of one RSS feed is about 100 lines of parsed HTML code (about 2KB). On one page ...
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274 views

WP-Super-Cache - generate cache programmatically

I wonder if there is possibility to generate WP-Super-Cache programmatically after the cache is being purged ( after I have published a new post ). I thought of writing some kind of crawler that will ...
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16 views

Caching and cookie-based redirects

Been banging on this for a while now, and I can't seem to make anything work, so I figured I'd ask here. I'm developing a site that contains age-restricted content. Every page runs a check to see if ...
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28 views

Preventing Cache for Text Content but not for CSS files and Images

I am front-end developer and my knowledge is limited for server-side. Excuse me if I am mistaken on terminology. I have Wordpress blog that I write blog posts about javascript. I update the same post ...
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0answers
70 views

Wordpress PHP 5.5 and OPcache

I have tried to run on my Apache 2.4 and PHP 5.5 OPcache. My admins turned it on for me but the site was not faster - it was slower. Is there a how-to somewhere or a code snipet needed in WordPress ...
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0answers
11 views

Updating WordPress or plugins causes site issues (due to API, I think)

I have a problem with all of the sites I host on my server. Whenever someone updates WordPress of plugins, I manually have to restart Apache to get things to work properly. Should the update process ...
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0answers
62 views

Set Session Time Limit for Password Protected Posts

I have made a series of posts and pages password protected on my website using the built-in Visibility setting. They all use the same password, so the user can view all of them after entering the ...
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0answers
31 views

Post not showing up sometimes on website

I have a weird problem. A particular post is not showing up on my website sometimes. So If I clear cache then it shows up. It is happening only to one particular post. I am not able to figure out what ...
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0answers
16 views

How to cancel a custom post type query based on existing cache file

Is there a proper way to greatly restrict the query (or remove it altogether) for a custom post type type-single.php file? Simply stated, for reasons of speed speed speed I've cached all relevant ...
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22 views

Should I use transients for these API call results?

I am consuming an API that gives me a list of people and their profiles. My initial idea was working perfectly fine when it's just the list of people because I was just saving the ids and names using ...
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0answers
40 views

Why does my css file keep caching on wp-multisite?

I am quite a newbie in web design and I hope someone can solve this problem for me, I have also tried wordpress forum but can't find the answer. I have a multisite (sub domain) with a strange caching ...
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0answers
44 views

Splash pages on a high traffic site

Could use some advice here. We have a fairly high traffic site web site using WordPress. Currently we have two VPS servers managing the site, one that holds WP, one that holds MySQL. The WP servers ...
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0answers
46 views

White screen of death WP multisite memcache

We have a WordPress multisite running 3 blogs and have had http://pecl.php.net/package/memcached installed by our hosts. We have tried the Memcache Object Cache plugin, we'll refer to it as MOC from ...
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0answers
158 views

Wordpress Varnish Age=0 or Not Caching (Cookies?)

I'm using Wordpress 3.8.1 and Varnish 3.0.5. I'm sure the Varnish is not caching, because of the VCL nightmare. And i also don't know where is the very standard / correct VCL for Wordpress. My ...
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0answers
42 views

My website resets when accessing the index page

So my wordpress theme and website is on a stage server, since it's under production. And this issue happens once in a while. Basically, if I log in as a user, and when I enter the index page, the ...
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0answers
66 views

Nginx + W3 Total Cache not working

I have a Ubuntu 12.10 x64 server running Nginx + MySQL, i've installed everything and my wordpress site is perfect. But, at the moment i installed W3 Total Cache, i got an error from Minify which ...
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0answers
23 views

Major cache but only on wordpress site

I have disabled all caching plugins, and i have cleared my browser cache, removed my temp browser files - how come i still not seeing my changes going trough on my wordpress page? I wait 20min they ...
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0answers
32 views

Wordpress Cache not working with some ajax calls

I need to install a plugin for caching my wordpress/buddypress pages or at least add define('WP_CACHE', true); to wp-config.php but when I do this, the button "join this group" that uses Ajax calls ...
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0answers
97 views

403 forbidden issue in wordpress

i have corner advertisement plugin in my wordpress website, this plugin used to convert given image into swf file and display it in any one of corner with peel effect. this plugin only not working in ...
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0answers
46 views

How to cache WordPress posts without using plugins

In a normal PHP page, I can use the following code to save the current PHP page: ob_start(); // write content echo '<h1>Hello world to cache</h1>'; $content = ob_get_contents(); ...
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0answers
137 views

Nonces and Cache

It's clear that form submissions and AJAX requests, especially sensible ones, need "nonces" to avoid certain exploits. However, with heavy use of caching systems it becomes harder to generate them ...
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0answers
13 views

Image not appearing when I update in a sidebar widget

Is there a cache or something to empty in wordpress when I make updates? On this site: http://richardclunan.com/ in the sidebar (or down the bottom if you're on a small screen) -- there's a widget ...
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19 views

Cache plugin Cache all Pages by cron

Does someone know if there is a cache plugin where you can choose if you can cache all pages at once? And if possible with a cron!
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71 views

Cache all products Woocommerce

I have installed a cache program to cache my pages. Ofcource the pages has to visited before it can be cached. Is it possible to run all the product pages at night and how? I hope someone has a idea! ...
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0answers
48 views

cache reset button and question about deleting cache

I need to put a "delete cache button" on front-end pages. I am looking for plugins for it. any experience or recommendation for it? Can you recommend me a plug in when i create a reset button? What ...