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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3
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1answer
105 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 ...
1
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1answer
23 views

Hook an action when a transient is deleted ? Can't get it to work!

I'm working on a plugin, and it caches a remote page when requested. The file is created with tempnam(). I save the path of that cached file in a transient, using the transient API. Once the ...
1
vote
1answer
87 views

How to prevent/delay MySQL connections when an object cache is used?

We are using an object cache backed by memcached, however I think that WordPress will still connect to MySQL on every page load, which shouldn't be needed if all queries can be handled by the object ...
1
vote
1answer
404 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 ...
1
vote
1answer
741 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 ...
1
vote
1answer
334 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 ...
0
votes
1answer
31 views

htaccess doesn't cache my latest news when logout

To speed up my website i'm using w3 total cache and some htaccess . . . it works just amazingly ! Otherwise, big problem, I have on my homepage the latest news being display, when I'm login, it ...
0
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1answer
21 views

String Replace Caching & Chance of Collisions

I am noticing that for various reasons I am using lots of string replacements in Wordpress and I am concerned about this impact on performance once it goes live. I am not advanced in caching but it ...
0
votes
1answer
42 views

HIgh CPU usage - Will using cache plugins help

i am having issues with CPU high utilization, more than 92% . Is there anyway to track which plugin or process or user is causing this issue? Will usage of any cache plugin will help this or not ?
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0answers
56 views

Extending WP_User class and using this sub-class during the whole lifecycle

I am currently struggling with this software design issue I can't seem to get hold of. What I am trying to achieve is the following: for every user on our website, I want to do an API request to a ...
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0answers
188 views

Run oembed separately outside the_content()

I have this structure for my content.php : <div class="featured"> <!--featured image here--> </div> <h1 class="entry-title">Post Title</h1> <div ...
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0answers
252 views

tinyMCE.activeEditor = null WP editor loaded in 'Text' mode?

I have a plugin which saves data via AJAX, and realised that it wasn't sending out any request. I opened up the console to look further, and low and behold when trying to look at the object ...
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0answers
407 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
134 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
97 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 ...
1
vote
0answers
220 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, ...
1
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0answers
34 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 ...
0
votes
0answers
11 views

garbled when logged in

This is so super strange. When I am logged out of XX wordpress site it looks like it should. If I then log in things start to get garbled in the layout. Let me explain: So I am sitting with a ...
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0answers
10 views

How to make a local cache of mshots images

I am using the Wordpress mshots api to generate automatic thumbnails of websites from the site url. I am using a customfield to capture the website url and pass the value to the mshots url to return ...
0
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0answers
12 views

Php function modifying the page's rendering engine buffer and blocking caching plugin

I tried to create a plugin which creates pages based on a CSV or excel file containing hundreds of city names and postal codes. It creates one page per city, with always the same design but different ...
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0answers
22 views

How to decode wordpress transient cache stored in database?

Wordpress stores caches using Transient and saved in wp_options table. I can't read those stored values - a sample snapshot is as below. If you know how to decode/read/parse them, please share.
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0answers
8 views

W3TC recreating cached files, but not uploading them to our CDN. We didn't request the recreation

We're having a weird problem on our production server. We use w3tc to compress and upload CSS and JS to our amazon CDN. After clearing all caches on the site, it works fine initially, then sometime ...
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votes
0answers
13 views

Page wrongly displayed when cache plugin activated

I tried both WP Rocket and WP Total cache, and when activating page caching, my pages look like this: http://www.goldnord.fr/ So all the pictures, animations, structure is gone. Is there a way to ...
0
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0answers
14 views

Object Cache - Avoid db queries totally

I am using object cache and have cached just about all queries but am stuck with the last 3, on a post archive page. They are all wp core queries. SELECT SQL_CALC_FOUND_ROWS wpm_posts.ID FROM ...
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votes
0answers
8 views

XSS Scripting in Cache files

On one of my client's sites I was going through a few of the pages ann noticed a popup appear with a spam advert on it. Finding this highly unusual I inspected the page source and found a bunch of ...
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0answers
28 views

can infinite scroll work with caching plugins

I want to know whether plugins like infinite scroll (https://wordpress.org/plugins/infinite-scroll/) can work with caching plugins.Will the cache plugins will have same effectiveness.
0
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0answers
41 views

Having 4000 posts, my site is so slow

My WordPress sites contains 4000 posts, and the difficulty is that I have to display all of them at one page. You know, it takes ages to do that, sometimes it causes my Firefox crash. Could you guy ...
0
votes
0answers
53 views

GravatarLocalCache Plugin Broken in WordPress 4.2

Trying to fix a plugin (https://wordpress.org/plugins/gravatarlocalcache/ not mine) which broke on the 4.2 update. The plugin makes a locally cached version of Gravatar.com avatars. Plugin hasn't ...
0
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0answers
43 views

w3 total cache : Force minified css to reload on client side when style.css is changed

Im trying to force the minified CSS file generated with the w3 total cache plugin to reload after editing the style.css file. Here's what i did : Empty all cache Add the file version after the ...
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0answers
25 views

Super cache caches mobile pages for desktop

Super Cache doesn't separately cache mobile pages and desktop pages. Sometimes I see a mobile cached pages on the desktop and the vice versa. How to solve this?
0
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0answers
86 views

WP Optimization: Multiples call to wp_options table all the time, is this normal?

I've a problem on my site since it is running very very slow and I can't find the cause of this. So I'll need some kind of desperate help from people here. I'll improve the question any time I perform ...
0
votes
0answers
140 views

Flush RSS Cache

I'm editing my RSS feed by adding extra elements containing custom fields I've created. I'm aware these won't work on standard RSS readers, but I've building a custom page for a different website that ...
0
votes
0answers
117 views

is_user_logged_in() not working after domain change

I am relatively new to Wordpress and I recently moved a WordPress website from one domain to another. I went through and fixed all the links and references that I could find. Now my website has all of ...
0
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0answers
33 views

Turn off Plugin Manually

I have installed and active wp-super-cache plugin, and It cached an PHP syntax error. I solved the error but can't run my website again because the error.log is still displaying the same error. I ...
0
votes
0answers
73 views

How could I exclude login modal from cache?

since I activated the W3 total cache I got a login problem, people write their credentials on login modal but after they press the sign in button, the page refresh but the user's name is not ...
0
votes
0answers
154 views

How to do Leverage browser caching for a specific file in wordpress?

I am trying to get my site passed in google speed test. My current speed is 74/100 For java script Leverage browser caching I've added this ExpiresByType text/x-javascript "access 1 month"1 to my ...
0
votes
0answers
147 views

W3 Total Cache problem with password protected pages

well w3 total cache plugins is really nice and make my speed of loading more fast but seems Total cache have problem with password protected pages and posts . when the password enter and page load ...
0
votes
0answers
94 views

Custom php Widget keeps disappearing from the front end

I've created a widget to show custom testimonials on the sidebar. It checks if the post has a custom field 'customer_review' then prints a it on the sidebar. Thing is, the testimonial keeps ...
0
votes
0answers
130 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 ...
0
votes
0answers
13 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 ...
0
votes
0answers
42 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 ...
0
votes
0answers
37 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 ...
0
votes
0answers
90 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 ...
0
votes
0answers
45 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 ...
0
votes
0answers
24 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 ...
0
votes
0answers
44 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 ...
0
votes
0answers
349 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
24 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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0answers
59 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 ...
-1
votes
0answers
36 views

WordPress Site Deleted

I went to settings, permalinks, and hit the clear cache button and now everything on my website has been deleted. Is this supposed to happen? How do I get it back?