APCu, a cleanup of APC, with opcode cache removed, provides a stable and well known API for user data cache. Version 4.0.0 is released. RPM are available in remi repository for Fedora and Enterprise Linux.
Read the article : PHP : opcode and user data caches So, I recommend all APC users to test this new extension, should replace it transparently for applications. For PHP 5.4 users yum remove php-pecl-apcyum --enablerepo=remi install php-pecl-zendopcache php-pecl-apcuFor PHP 5.5 user yum remove php-pecl-apcyum --enablerepo=remi-test install... Lire php-pecl-apcu-4.0.0