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Using both Opcache and Xcache

I'm just wondering if it is foolish to use Xcache 3 with Zend Opcache at the same time to cache PHP files? I know that both do almost the same job, but are not sure if this will affect performance and speed.

I want to speed up the loading of the php page so that visitors do not have to wait long.

any thoughts on this?

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To answer your question: Yes, you should not run xcache and Zend Opcache at the same time. If you do this, you will get undefined behavior, first of all “cannot update the XYZ class”. This happened to me after a system update when a supporting package activated Zend Opcache on an existing xcache installation.

As for the question of how to use it for opcaching, it depends on your specific code - I would recommend setting up a test environment and running Apache Benchmark or a similar tool to check response time.

When installing Wordpress by default, I managed to get acceleration (without cache vs xcache) about 5-7x in size, which is very significant. If you really need more, you will need to check out the other features already mentioned in the comments, for example

  • using loadbalancer and multiple application servers
  • using memcache or memcached to cache database queries and other heavy load operations.
  • Switching to another database system, such as NoSQL (be careful with the consequences)
  • Changing the architecture to a static site using web services that provide interactive content.
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