This guide concerns website optimization and more specifically the use of a cache engine on it.

Introduction

• When Infomaniak notices that your website consumes more resources than other sites on the same server, an analysis is conducted.
  • Often, it turns out that a simple modification of a request or a parameter would allow you to optimize your site and reduce the server load.
  • You will then be contacted by email with instructions to follow, which often include the installation or activation of a cache engine.
• Resource consumption is not necessarily linked to the number of visitors.
  • A well-optimized, up-to-date site with a properly configured cache engine can handle tens of thousands of daily visitors, while a poorly optimized site can consume far too many resources with just a few visits per day.
• A cache engine temporarily stores frequently used data to provide it more quickly upon new requests.
  • This significantly improves the site's speed and reduces the load on databases or web services.
  • To install a caching system on **Serveur Cloud** Infomaniak, refer to **this other guide**.

Enable a cache engine...

… on WordPress

WordPress has many cache plugins. Here are the most popular and effective ones:

• WP Super Cache (free, easy to set up)
• W3 Total Cache (advanced, multiple options)
• WP Rocket (paid, simple and performant interface)

Activation procedure:

1. Log in to your WordPress admin.
2. Go to Plugins > Add New.
3. Search for one of the mentioned plugins, install it, and then activate it.
4. Configure the cache options according to your needs: page caching, CSS/JS file minification, gzip compression, etc.
5. Test the performance with and without cache using tools like Google PageSpeed Insights or GTmetrix.

To learn more, also check out:

• https://news.infomaniak.com/6-moyens-techniques-pour-optimiser-un-site-wordpress/
• https://news.infomaniak.com/memcached-w3totalcache/
• https://www.seomix.fr/?s=cache

... on Joomla

Log in to the Joomla administration and then follow these steps:

1. Go to System > Global Configuration.
2. Select the System tab.
3. In the Cache section, enable the system cache.
4. Choose the type of cache: Conservative (individual user cache) or Progressive (shared cache between users). Progressive caching is recommended for better performance.
5. Set the cache validity duration in minutes (for example, 60 minutes for an active site or longer for a static site).
6. Save the settings.
7. To manually clear the cache, go to System > Manage cache and then delete the cache files.

Joomla 5 features improved cache management and a modernized interface compared to version 4.x.

... on PrestaShop

Log in to the PrestaShop administration then:

1. Go to the menu Advanced Settings > Performance.
2. In the Smarty section, enable the Cache option.
3. In the CCC (Combine, Compress and Cache) section, enable all available options.
4. In the Cache section, enable Use cache.
5. Follow the instructions to install the recommended extensions or modules (e.g. Memcached, Redis) for additional optimization.
6. Save your changes.

... on Magento

Magento 1.x is obsolete. For Magento 2, proceed as follows:

1. Log in to the Magento admin.
2. Go to System > Cache Management.
3. The cache is enabled by default. You can flush or refresh the cache from this interface.
4. Make sure all recommended cache types (Configuration, Page Cache, Layouts, etc.) are enabled.
5. For optimal performance, use additional solutions like Redis or Varnish if your hosting supports them.

... on Contao (version 4.x)

Log in to the Contao back office then:

1. Go to Modules > System > Configuration.
2. In Cache mode, check the options Use system cache and Use browser cache.
3. Save your changes.

... on Drupal (version 9.x)

For Drupal 7.x (still in use but not recommended), proceed as follows:

1. Log in to the Drupal administration.
2. Go to Configuration > Performance.
3. Check the box Cache pages for anonymous users.
4. Save.

For Drupal 9.x (recommended): caching is enabled by default and managed via internal modules. You can configure the cache in Configuration > Development > Performance. To further improve performance, use external systems such as Redis or Varnish if available.