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January 14, 2010

Beware WP-Cache

Trying to speed things up here. Pages loading slow, and the host is talking about overages. Well, just a hint, don’t look to the WP-Cache plugin for speed. I found this today:

No more wp-cache • deanjrobinson.com

So last night almost exactly 24 hours after I installed, activated and configured wp-cache, guess what happened. Yes, my blog shat itself again. Thing was I was asleep and didn’t find out about it until this morning, so my site was down for 8 hours, really quite pissed off about that.

Wish I read this yesterday. That’s what happens when you watch a WordCamp 2007 video — they recommended WP-Cache, assumed it would still work if WP engineers made a point to recommend it. But that video is now three years old, what was I thinking?

Same problem here, the plugin seems to work for a while, fast. Then out of nowhere your pages stop working, entire site goes into a freeze. As soon as you turn off the plugin your site works again. But even when the plugin is operating “normally” you can’t leave a comment on cached pages!

Post Image The Easy Peasy Way
Get post attacments?
26 comments
page 1065
Upload From Url
Upload to url?
6 comments
page 326
Are Child Themes The Best Option
Wp child themes?
15 comments
page 1262
Silence Is Golden
Silence is golden wordpress?
3 comments
page 213
How To Add Sidebars To A Theme
Html hot add a side bar?
11 comments
page 1053
Fun With Sidebar Tabs Styling
Position of the tabs thematic?
2 comments
page 336
How To Add Sidebars To A Theme
How to add picture to the wordpress sidebar on sidebarphp?
11 comments
page 1053
Using Your Own Url Shortener
Short url?
4 comments
page 1190
Why I Ditched Disqus
Styling disqus widgets?
5 comments
page 1175
Wordpress 25 Exif Fields
Wordpress exif?
12 comments
page 230
Html 5 Gallery
Html 5 gallery?
6 comments
page 1305
Dont Mess With My Toot Toot
Fun with toots?
16 comments
page 599
Dont Mess With My Toot Toot
Fun with toots?
16 comments
page 599
Converting Wordpress Themes To Habari
Habari timthumb?
one comment
page 694
Wordpress 25 Exif Fields
Habari timthumb?
12 comments
page 230
Fun With Sidebar Tabs Styling
Tabs with html css on same page javascript?
2 comments
page 336
Using Your Own Url Shortener
How to have own url short?
4 comments
page 1190
Post Image The Easy Peasy Way
Insert conditional image php wp?
26 comments
page 1065
How To Add Sidebars To A Theme
Wordpress sidebar above main sidebars?
11 comments
page 1053
Using Your Own Url Shortener
Run short url using htaccess?
4 comments
page 1190
Html 5 Gallery
Html5 simple wordpress theme?
6 comments
page 1305
Dont Mess With My Toot Toot
New posttype not displayed wordpress?
16 comments
page 599
Quick N Dirty Replacement Text
Wpupdatepost object?
no comment
page 122
Updating Code Snippets Here
Fun wordpress plugin?
one comment
page 1338
How To Add Sidebars To A Theme
Wp register sidebars?
11 comments
page 1053
Html 5 Gallery
Html5 wordpress theme?
6 comments
page 1305
Post Image The Easy Peasy Way
Get post images?
26 comments
page 1065
Updating Code Snippets Here
Wordpress fun plugins?
one comment
page 1338
Post Image The Easy Peasy Way
Wordpress get first image large?
26 comments
page 1065
Using Wordpress As A Php Framework
Wordpress create your own framework?
2 comments
page 335
Improve Your Typography With Plugins
Wordpress typography plugin?
one comment
page 721
Quick N Dirty Replacement Text
Dirty replacement?
no comment
page 122
How To Add Sidebars To A Theme
How to add pages in footer wordpress?
11 comments
page 1053
  1 query every 1912 seconds, updated 1 seconds ago.
Thursday, 4pm
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 Anvil

I had to delete from my blog as well, it did horrible things to it. Slowed it to a crawl, created errors etc.

Monday, 12pm
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 PJ

Thanks for the tips Simon.

I did test the plugin on a non-vital domain first, but failed to notice the plugin was not recently updated.

Monday, 3am
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 simon

I would have been extremely wary about installing a plugin that hasn’t been updated since September 2007! WordPress has changed a hell of a lot since then…

When I’m investigating a new plugin (especially one that is providing absolutely critical functionality), I always check how recently the plugin was updated, how active the author is, I check out comments & answers on the support forum, etc.

I then search for a key phrase (e.g. “cache”) on wordpress.org/extend/plugins – you see below each result the date the plugin was updated, number of downloads and user ratings – all very helpful stuff.

Sunday, 12pm
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 admin

Turns out the incident that night was a ddos.

Can’t say I know for sure what happened with wp-cache, why it didn’t work for me. But I have one theory–maybe wp-cache broke because of the ddos, maybe it cached blank pages? Anyway, I don’t plan to investigate wp-cache further, but figured it was worth mentioning.

Friday, 9pm
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 admin

Update: turns out my host had an “incident” that night, most likely unrelated to the wp-cache plugin. However, my non-cached sites were definitely working while the cached site was not working.

I suppose it’s possible the downtime caused wp-cache to break. Maybe blank pages were cached? But there are other reasons to not use wp-cache: the author says on his site he wants someone else to take over development of it. Sounds like he doesn’t have time for it.

In any case, I’m going to try Super Cache ASAP.

Friday, 12pm
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 admin

I just realized you’re the author of it. Now I feel dumb.

Friday, 12pm
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 admin

Thanks for the comment Donncha. Yes, I’m going to try installing it today.

Are you using Super Cache? How do you like it?

Friday, 12am
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 Donncha O Caoimh

Why not just use WP Super Cache? Much better and faster than any other caching plugin. :)