# Performance

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

<figure><img src="https://3503800744-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FIiEHKRx5AeABNDLcRlWX%2Fuploads%2FBBOm8mP7gYh42lDB5UBO%2Fperformance.png?alt=media&#x26;token=e2274b93-c80c-45fb-b756-02d09402c108" 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="https://3503800744-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FIiEHKRx5AeABNDLcRlWX%2Fuploads%2FUqBDIarpNgjiWpbv2LqS%2Fperformance_debug_mode.png?alt=media&#x26;token=4c254641-4f43-4775-a756-e9c84818663d" alt=""><figcaption></figcaption></figure>