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Query Cache 
Version
1.0 RC2 (last update on Apr 18, 2008)
Rating
Compatibility
Votes
16
Favoured
45
License
GPL
Non-Commercial
Type
Views
27719
Date Added
3 October 2007
Because this system uses memory based caching, you must have one of the following installed on your system to use Query Cache
--APC
--XCache
--Memcached
--File
--Eaccelerator
You can also write your own backend storage method and plug it in!
Note! there are 2 different versions of this component. One for Joomla 1.0, and one for Joomla 1.5. Make sure you use the right version!
WARNING! DOES NOT WORK WITH LEGACY MODE ENABLED! THIS WILL BREAK YOUR SITE IF LEGACY IS ENABLED! You have been warned!
See the FAQ for more info http://www.joomlaperformance.com/component/option,com_easyfaq/task,cat/catid,39/Itemid,7/
NOTE! This component works fine with PageCache! BE AWARE! DO NOT ATTEMPT TO USE PAGECACHE WITH DATABASE CACHING (all others work fine) WITH THIS COMPONENT. You have been warned.
Release Candidate 2 is out. Included are fixes for fatal errors on certain systems, as well as many more "minor" issues.
byJDevOnline on September 6, 2009
I had a very horrible experience with this component. My site broke, even I turned the legacy mode off.
There is support at all, before installing this, please see how many people are got this sites broken and how long the their threads on their forum are still un-answered.
http://www.joomlaperformance.com/forums/func,showcat/catid,19/
There is support at all, before installing this, please see how many people are got this sites broken and how long the their threads on their forum are still un-answered.
http://www.joomlaperformance.com/forums/func,showcat/catid,19/
byEIanetti on April 4, 2009
Installed it, read the FAQs on the developer's site, turned it on and saw instant improvement. Get this one!
I downloaded the plugin and installed it and BAM! it works!
bysmoothdude11 on September 11, 2008
Maybe I don't have a huge query website, but this actually slowed my site down a bit. Not by much but just a bit. I tested the component with webwait many different times and during different days just to see, but it can't hurt to try on your site if it is slow.
bysgrayban on September 10, 2008
Wow I can't get over the speed or our site now. Between caching and this extension our site zings !
byWebJIVE on January 18, 2008
I was a little skeptical about this component but I decided to give it a go. I used http://webwait.com/ to provide some basic benchmarking which closer resembles what a typical user would see.
I ran the benchmark without the product installed. Next I enabled eAccelerator and ran the bench again. What a difference! I then ran the bench again using the FIle method versus eAccelerator... Guess what? It was just as fast so, if you don't have eAccelerator in your hosted environment, don't worry, this component will still have a big impact especially for heavily queried sites like CB sites which I benched against.
Another bench I ran was turning on the Joomla cache.. Ran the bench again and even more improvements were seen on sites with big images...
I would say install at your own risk but so far, it's working perfect.
I ran the benchmark without the product installed. Next I enabled eAccelerator and ran the bench again. What a difference! I then ran the bench again using the FIle method versus eAccelerator... Guess what? It was just as fast so, if you don't have eAccelerator in your hosted environment, don't worry, this component will still have a big impact especially for heavily queried sites like CB sites which I benched against.
Another bench I ran was turning on the Joomla cache.. Ran the bench again and even more improvements were seen on sites with big images...
I would say install at your own risk but so far, it's working perfect.
bypertorstensson on October 4, 2007
I have tried this out with APC, and it truly does wonders on your CPU load by _vastly_ decreasing the queries to the MySQL database. Mind it is still in a beta stage and not ready for production use, but when it is, I think it will do wonders for a lot of Joomla users with the ability to install APC, Xcache or Memserve on their server(s).