Joomla 3x CPU 100% usage, need advice.

[pacowilson]

Hey guys.

I really like the joomla. It's very easy to build gorgeous customized websites with this Open sources platform. I chose the joomla to build my business website from Joomla 1.5.

Past two years ago, we upgraded the joomla 1.5 to joomla 1.6, then joomla 2.5. We moved the shared hosting to business hosting, it runs good. The average loading time is 3 - 4 seconds.

Just few months ago, I decided to upgrade the joomla 2.5 to joomla 3. Well, suddenly, we realized the joomla 3 with clean code, but we experience huge problem. When the users reach up to 20, the hosting CPU usage 100%. Especially, when googlebot is crawling our website.

We need advice, please help me.

(Please note that we use the jcache, and JCH Optimize Pro, enabled cache plugin, as well as free CDN cloudflare. If you want to see our website, please see below signature.)

[pacowilson]

Updates:

Finally solved the problem.
We are using the older version of PHP which is PHP5.3.28, after we upgrade the version to PHP5.4. The CPU usage drops significantly.

If you want to know more about the performance between two, you should check this article:
https://www.lourdas.name/blog/php-53-vs ... mory-usage

Ps: Upgrade php version for Cpanel users
Go to [Select PHP Version] > Choose the version you need to upgrade (either 5.4 or 5.5) > Click [Set as current] > done.

Please note that you need to look for the default modules carefully, mysqli (must be ticked).

[aelsharawi]

I had similar problem,however I disabled jch optimizer (website is much faster with cloudflare alone (using max optimization))

but still have this cpu load,and I/O load:

Im using php 5.5 with apc cache for joomla.

please advise "I know that apcu is not yet fully compatible with joomla 3.3"

what shall I do ?

[itoctopus]

A few questions:

- How many articles do you have?
- Are you on a shared hosting or a VPS? You should be on a VPS.
- Have you checked the slow query log to see if there are any queries that are causing this problem?

It might be that the migration to 3.3 was botched somewhere, and that is causing all these issues.

[technicaldk]

If you are on a shared host most likely if you have 20 current connection (EP) you would reach the CPU limit. Maybe you should ask host to add more CPU resources to your account or switching to a VPS.

[josesmith886]

Latest update:

Just back to several days ago, my hosting provider shutdown my VPS, due to the DDOS attack. After I moved to another environment, my website load speed was still relative slow (I have tried all suggested methods including installation of plugin, and cache component), when online users reached up to 12, the CPU usage surged up to 100% usage. Fortunately, I have found the problem.

1. Enable the debug mode, check the database queries, it showed 240 duplicate queries errors.
2. Install another template from different company, my website load in 1.5s.

[josesmith886]

This is the pingdom test report for my site.

For the duplicate queries, I also posted another thread:
http://forum.joomla.org/viewtopic.php?f=706&t=860981

[johnyaz]

Thank you for the solution