w3 total cache not detecting memcached

[ethanielc]

I am on Plesk 12.5 with CentOS 7. Memcached installed via EPEL repo.

[root@plesk ~]# rpm -qa|grep memca
libmemcached-devel-1.0.16-5.el7.x86_64
memcached-1.4.15-9.el7.x86_64
libmemcached-1.0.16-5.el7.x86_64

[root@plesk ~]# systemctl status memcached.service
● memcached.service - Memcached
Loaded: loaded (/usr/lib/systemd/system/memcached.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2016-04-18 17:27:55 SGT; 4min 24s ago
Main PID: 9402 (memcached)
CGroup: /system.slice/memcached.service
└─9402 /usr/bin/memcached -u memcached -p 11211 -m 512 -c 1024 -l 127.0.0.1

Somehow Wordpress W3 total cache not detecting the module(attached image). PHPinfo showing memcached module is loaded as well on PHP 5.6.

Any idea?


edit 1: installed memcache(no d) PHP extension and w3TC detected memcached correctly.

1. [root@plesk ~]# /opt/plesk/php/5.6/bin/pecl install memcache
2. [root@plesk ~]# echo "extension=memcache.so" > /opt/plesk/php/5.6/etc/php.d/memcache.ini