XCache for vBulletin Caching
 

This mod will replace the default vB_Cache_Db class (database cache) used in vBulletin with an xCache implementation of it.
vBulletin has promised to implement this option themselves, but I'm sick of waiting, so I created this.

What are the benefits of using XCache for caching over MySQL (Database) ?

In theory, quicker page load times, lower server load. This will offload the duty of caching from mysql and throw it into the RAM.
It will also reduce your query count per page.

The most staggering difference you will notice is with the CMS, or any mods that make good use of the cache.
For instance, in my dev site using the default CMS content and settings, browsing as a guest, I was able to shave off an average of 0.06 seconds from the page generation time (0.23 -> 0.17 seconds) and 43 queries (86 -> 43)!
In a live site, the reduction in queries and overall time spent serving the page will have a large effect on overall performance in a busy site.

Make sure that you also have the datastore cache method set to xcache as well for further query reduction: https://www.vbulletin.com/docs/html/datastore
Also install "Load templates from XCache" for further query reduction: https://vborg.vbsupport.ru/showthread.php?t=255994

Any drawbacks?

Other than a file edit required on every vBulletin upgrade, none that I can think of... If you think of one, post it.

What about other data caches ? (memcached, apc, etc.)

I could write those as well, if there is a demand for it, and they happen to work similar enough to xcache.

This is a beta!

This has been tested in a live forum for a few days, and no incidents/side-effects have been noticed or reported, but I cannot yet guarantee it is 100% perfect.

This mod requires one file edit

See this bug to find out why: http://tracker.vbulletin.com/browse/VBIV-13241

Requirements

This was designed to fail gracefully by falling back on the DB cache if there is an error, so if there is an error you will not even realize it.

Make sure these requirements are met:

• XCache 1.3.2 installed (only version that I tested) (verify by viewing phpinfo page)

The following are in your XCache ini settings (php.ini usually):

• xcache.var_size = 32M (32MB; at least)
• xcache.var_slots = 8k (8000; at least)
• Set xcache.admin.user and xcache.admin.pass to whatever you want (keep in mind that the pass must be MD5'd)

Restart after making any changes.

Another tip is to set your xcache.count and xcache.var_count to the number of CPU cores that you have.

See the documentation here: http://xcache.lighttpd.net/wiki/XcacheIni

After running this mod for a while, check your xcache admin page to ensure that your var_slots and var_size are large enough.

Install Instructions

1. Upload the contents of the UPLOAD folder in xcache.zip to your forum root

2. Open up your /includes/config.php file and add the following:

Edit it to include your xcache admin username and password

3. This step will need to be repeated whenever you do a forum upgrade.
Open up /vb/cache.php.
Find:
Replace with:

First post. lol Great!!!!!!!!!!!!!!!!11 love Mods like this one. Will try and let you know

Thanks, I look forward to hearing the results.

Great mods...love it!

Thanks a bunch

I'd be interested apc .... Should there be a demand other than myself of course.

Good work on this

What's the possibility of using this on a 3.8?

No need, vBulletin 3.8 doesn't have a cache table at all. It also already has datastore cacheing for xcache.

It will never work, the cache was added in 4.0, and even now it's only really used for the CMS and maybe a few odds and ends in the forums.

Installed not sure if there was too much of an improvement on my site...

What's the difference between this mod and vBOptimise?

it seems you put lot of effort in this
but I do not know why but I am only convinced by server Header cache and mod expires instead

Thanks for sharing this! :)

you also need to ensure that your webhost supports xcache

mine does so for me this mod is useless, only install if your host supports it

Who is using this and what are the results?

Any compatibility issues with mods or is this seamless?

well Im using it with vb4.1.7 and I guess I see some improvements on the site but not much. Maybe because my style is base on 90%images. but a bit of improvements here and there makes a change.

thanks

I would also appreciate an APC version of this.

+1 APC

please, 4.1.10 ?

I am using it with 4.1.10 no issues... I run my own dedicated Server Box 2 Quad Core Xeon with 28GB Ram running it with Windows 2008 64 bit server hosting with XAMPP/Apache Friends just downloaded a windows version of XCache works fine... It did speed the load times up about 5% on the CMS home front and about 3% for the forums... Not sure how to tweak it using default settings or suggested settings...

Do i have to enable XCache data store in config.php ?
Do i need to set the xcache admin pass in config.php?
What php handler i should use?

you ned to make sure your your webhost allows it, or supports it

I;ve missed some note the dev wrote, the xcache must be enabled in config.php but the other 2 questions still need answer about best php handler for xcache because i'm getting internal server error with some of them, i'm using suphp atm.

CMS problem. Categories in the CMS can not be called.

An unexpected error has occurred. Please try again later.
If the problem persists, contact the technical administrator.

Cache system can unfortunately not be deleted

Interesting.
I started looking at this in the summer but had to put it on hold.
Might have to play with this a bit.

The datastore cache does not have to be set to xcache. That was only a recommendation.
The xcache admin user and pass must be set in config.php. Read the install instructions to see the code necessary to add to config.php to do this.
As for your question about a php handler, my mod does not care which you use, but xcache might need a specific handler - I'm not sure. You will have to ask google or look on the xcache website about installing xcache.

Do you have any mods installed? If so do you mind listing them?

Also what do you mean "cache system can unfortunately not be deleted."

Not sure which "default settings or suggested settings" your referring to, but here's basics of how to tweak xcache.
Actually there isn't really much to it.
Have a read here at what the different options affect:
http://xcache.lighttpd.net/wiki/XcacheIni

It would be useful for you to have xcache admin. It will tell you your cache sizes (php cache = xcache.size, var cache = xcache.var_size) in megabytes, and will tell you how many slots are available for each (php slots = xcache.slots, var slots = xcache.var_slots).
To see if you need to increase, or could get away with decreasing, those numbers, check how much memory is being used as well as how many slots are being used, then tweak accordingly.
If you are using all memory, you would increase memory.
If you are using all slots, increase the slots.
You want to leave extra room for the cache to grow, but keep in mind any memory you give to xcache takes away from memory available to the rest of the server, so it is up to you...

https://vborg.vbsupport.ru/attachmen...1&d=1328169972

My Addons

404 Area 1.0
Admin Log In As User 3.21
Change Threads Prefix Inline 2.2.0
CT second_post_Ads 2.0.8
DownloadsII 6.0.9
Forum-wide Search For Unanswered Threads 4.2.0
Fussball Tippspiele 1.4.25 RC 1
MARCO1 Hide All 4.5
MGC chatbox Evo 3.0.0
Post Thank You Hack 7.82
Sids Hide Hack 0.9.8
Tabs en vBulletin 4.x 2.0.3
Template Modification System 1.2.0 Beta 4
Title Replace 1.1
vBulletin-CMS 4.1.10
vBulletin-CMS Links 1.0.0
VSa - Advanced Forum Rules 5.0.5
VSa - Sub-Forum Manager

My server
Operating System: Debian 6
Web Server lighttpd - cgi-fcgi
MySQL version 5.1.49-3
PHP 5.3.3-7 + squeeze6
Xcache Version 1.3.0

I'm asking about if i really need to set the xcache user/pass in config.php because i couldn't authenticate to xcache admin panel until i turned off the admin authentication.
Is it ok?

Running this is on a site that has about 1500-2000 users on at a time. No negative results not seeing a dramatic change either. I run this with vboptimise.

Also you do not need to put in xcache admin/pass if your not using the xcache password system. I also do not have a problem clearing the cache.

If you're already running vBoptimize (pro) I don't know how much this is going to help you. They already cache a lot of infomation that can be cached.

Also count me for an APC version

I can't find the file: /vb/cache.php

Edit, nvm.

Zach, do you see much difference between this mod and vBOptimise Pro other than the $100 price tag?

lol there is a free option

CLOUDFLARE

i updated my DNS and how wonderful it is

I don't use cloudflare.
I use EdgeCast CDN.

This mod doesn't cache anything new.
It's about moving what vBulletin caches by default from the DB into memory (xcache).
It makes improvements to the CMS, that's about it for default vBulletin.

Forumhome blocks use the cache, so does showgroups.

1+ for APC please