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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4k views

How do I force Wordpress to show most recent version of images in the media library?

My workflow is sometimes the following: Delete many images from the media library at once (named for example, 01.jpg, 02.jpg, 03.jpg...). Re-upload a series of images with the same file names ...
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1answer
215 views

How to automatically convert “%” and “+” in image urls on upload

I mass import products via csv and use this plugin http://wordpress.org/extend/plugins/cache-images/ to download the images to my server. Problem is some of the image urls have % and + characters in ...
2
votes
3answers
1k views

Does a query executed through wpdb class get cached?

I am not sure how WordPress cache the queries. I had the impression that whenever I execute a query through wpdb class, it gets cached. For example, on codex under Select a Row and Select a Var, it ...
2
votes
6answers
846 views

WP script versioning breaks cross-site caching?

I am loading JQuery from the google CDN using the following code: wp_deregister_script('jquery'); wp_register_script( 'jquery', // handle - WP uses this name to refer to script ...
13
votes
6answers
8k views

W3 total cache - cache refresh programmatically

I am building a Digg like website in WordPress. After installing W3 Total Cache, I noticed certain elements such as number of votes (and voters ids) per post are cached even though they shouldn't be ...
1
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2answers
871 views

WP Super Cache separate cache for mobile

I'm using the WP Super Cache plugin and inside my theme I have code that executes differently if the site is viewed on a mobile device (iOS, Android) than a desktop browser. How do make WP Super ...
0
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1answer
442 views

Minifing js files with w3 total cache and expiring the combined file

I'd like to clarify several details about how w3 total cache works. I'm using w3 total cache to combine multiple js files into one. I'm also setting expires headers from the browser tab to twenty ...
1
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5answers
258 views

When use a cache system with WordPress

(sorry if this is duplicated but I couldn't find anything related) I have an WordPress 3.0.3 instalation with some custom coding and tried the W3 Total Cache plugin but had some problems...so I've ...
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3answers
396 views

Spam injected in w3 total cache page cache

I'm trying to fix a site which has been injected with external spam. After inspection I found out that the external content (so far just html advertising different kinds of drugs, no scripts) was in ...
2
votes
1answer
221 views

Should the page cache be refreshed often?

In the w3 total cache there is the option to set the time until the cache is flushed (and thus, recreated on the next time a visitor comes by). My question is, assuming I've got a lot of content on ...
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2answers
225 views

Error activating certain plugins

When I try to activate All-In-One SEO Pack or ANY (I've tried all by now!) caching plugin, the page goes blank - i.e the content of the page empty, except the WordPress bar on the top and the toolbar ...
0
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1answer
78 views

How can I permanently cache or “archive” a WP blog without needing future maintenance

I have a client who has an annual complete makeover of their website design and content, but they still want their old sites available to view (each with that year's respective design/CSS). Once ...
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2answers
187 views

How to find time last viewed?

I want to run an update script on pages that haven't been viewed and updated within X days. I'm using post meta to cache some related RSS feed data, and I want it updated once a week or two, but only ...
1
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2answers
583 views

How to set the cache for the built-in SimplePie feed parser?

I'm using the built-in SimplePie, AKA fetch_feed(), to retrieve a feed, and I want to be able to adjust the cache time from an admin menu. SimplePie itself is well documented, but not so much the ...
3
votes
2answers
265 views

How can you develop on a live WordPress installation that is using W3 Total Cache?

Or to make it easier: you just want to disable the caching in order to see your changes in realtime. Any solution that would allow you to disable caching based on IP, logged user or cookie will be ...
10
votes
3answers
5k views

What is the best caching option for WordPress multi-site on non-shared hosting?

What caching plugin configuration do you recommend and why under the following assumptions: full control of the server configuration running WordPress in multi-site/multi-domain mode most domains ...
20
votes
2answers
3k views

What are the best practices for using a caching plugin on a shared host?

I've launched quite a big site the other day and I'd like to incorporate a caching plugin. The setup is single-site with some Buddypress features mixed in (for user registration, maps with gpress, ...
0
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1answer
1k views

How can I add Expire headers to images?

I'm trying to speed up my site a bit. How can I add Expire headers to images I upload? Must this be done with Apache configuration, or is there a setting or plugin to do the job?
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2answers
224 views

What archive plugin works with W3 total cache?

All plugins I've tried makes the page go blank. I tried so far: Smart Archives Reloaded Clean Archives Reloaded Better Extended Live Archives Thanks. Tal
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2answers
335 views

Is it possible to save an entire piece of rendered HTML in a transient?

I have some query that brings around 50+ posts (I know it's not ideal but had to do that to build something the client asked..) and a set of loops to order them in a certain way and it looks like that ...
0
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1answer
793 views

W3 Total Cache plugin chronic message

I am currently using Amazons Cloud Front service with the super awesome and easy to use W3 Total Cache wordpress plugin. All appears to be working correctly but I do get a chronic error in the admin ...
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2answers
247 views

How many caching plugins should be used?

Online researching shows that there are many plugins out there to perform caching on WP. Just to name a few: WP Super Cache W3 Total Cache WP Widget Cache DB Cache Reloaded 1 Blog Cacher Hyper ...
20
votes
2answers
4k views

How well does WordPress scale?

With the new WordPress and it's new features, it seems like WordPress is capable of much more than a simple blog engine. But how well does WordPress scale being used by say 10k -> 100k users per day? ...
2
votes
2answers
143 views

Plugin a specific cache functionality?

I have written a plugin that puts a (google) favicon in front of each link in my blog. Really simple. Just uses a simple preg_replace_callback on hrefs: $changed_html_reference = ...
1
vote
1answer
131 views

Plug-in Conflict: Art Direction and Super Cache

I use Art Direction plugin to create customized posts sometimes. I also want to use Super Cache plugin for traffic spikes. However I've found that once you have Supercache activated Art Direction ...
54
votes
12answers
4k views

Steps to Optimize WordPress in Regard to Server Load?

Besides installing W3 Total Cache or another caching plugin what steps can I take to make sure that my theme and site run as fast as possible.
6
votes
2answers
906 views

Configuring WordPress for Amazon CloudFront Caching?

Amazon CloudFront is a content distribution network (CDN) that can help you survive a huge amount of load in a short amount of time. What's the easiest way to configure WordPress to host its files ...