# Performance

Displays information related to the different caching systems used by GLPI including:

<figure><img src="/files/7twWrYHUdbMshknzL00r" alt=""><figcaption></figcaption></figure>

* **PHP opcode cache** - Improves performance of the PHP engine when interpreting the different PHP files :
  * The "Zend OPcache" is installed
  * Memory
  * Hits rate
  * Out of memory
* **User data cache** - General-purpose cache used by GLPI:
  * You can use "php bin/console cache:configure" command to configure cache system.
  * "filesystem" cache system is used
* **Translation cache** - Cache used for translations to avoid having to read the locale files for all translations.
  * "filesystem" cache system is used

{% hint style="info" %}
The cache systems for user data and translations can be changed or configured from the **`cache:configure`** CLI command.
{% endhint %}

***

### Debug mode

In debug mode, you also have the ability to clear the different caches from here.

<figure><img src="/files/AhvPQDrRgzhdrlK6xIcf" alt=""><figcaption></figcaption></figure>


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