Using APC or OPcache with PrestaShop

APC (Alternative PHP Cache) and OPcache are PHP opcode caching systems that improve performance by storing precompiled PHP code in memory. This allows your PrestaShop store to serve pages faster and reduce server load. On ruachost.com, both APC and OPcache are supported depending on your PHP version and hosting plan.

Why Use APC or OPcache?

• Speeds up page rendering by avoiding repeated PHP compilation.
• Reduces CPU usage and improves scalability.
• Enhances customer experience with faster load times.

About APC and OPcache

• APC → Works with PHP 5.4 and earlier. It is a separate extension that may or may not be installed on your server.
• OPcache → Built into PHP 5.5 and newer. It is a drop‑in replacement for APC and does not require separate installation.

Using APC or OPcache with PrestaShop

1. Ensure APC or OPcache is installed on your server:

   • On Ruachost Managed VPS accounts, OPcache is enabled by default.
   • APC may be available on legacy PHP versions.

2. No special configuration is required in PrestaShop.

   • APC and OPcache work at the web server level.
   • PrestaShop automatically benefits from the performance improvements.

3. To verify:

   • Check your PHP settings in cPanel → PHP Info.
   • Look for APC or Zend OPcache sections.

Important Notes

• Use OPcache if you are running PHP 5.5 or newer.
• APC is deprecated and should only be used on older PHP versions.
• Always clear the Smarty cache after enabling or changing caching systems.
• For more details, see the official PHP OPcache Documentation