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W3 Total Cache (and WordPress) not recognizing memcached after installation – Debian

Ok, so I’m trying to enable the memcached mode of the W3 Total Cache on my WordPress site to get better performance compared to the disk mode I have at the moment.

The memcached option in the Page Cache Method: drop-down menu of the W3TC settings page was greyed out and disabled since memcached was not installed in my machine. Thus I followed instructions from this website and this question and ran the following commands:

apt-get -y update && 

apt-get install -y memcached && 
service memcached start

apt-get install -y git nano vim netcat && 
apt-get install -y libmemcached-dev libmemcached11 git build-essential  && 
apt-get install -y pkg-config zlib1g-dev && 

git clone https://github.com/php-memcached-dev/php-memcached && 
(cd php-memcached && 
git checkout php7 && 
git pull  && 

phpize && 
./configure --with-php-config=php-config && 

make && 
make install)

memcached is successfully installed and say echo "stats settings" | netcat localhost 11211 works perfectly, but the problem persists and the phpinfo() page doesn’t have a section for memcached. This is obviously because my WordPress does NOT yet recognize memcached as a possible method for caching stuff.

So, what I’m asking is how can I make my WordPress understand that memcached is a possible caching method?? 🙂 Am I missing any configuration step?

I’m using PhP 7.2.28 and WordPress 5.3.2 on Debian GNU/Linux 10.

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2

Answers


  1. 0

    Do you have PHP-FPM installed? I’ve run into issues where I’ve forgotten to restart it after installing something new.

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  2. 0

    Check what version of php you are currently using by running the following command,

    sudo php -v

    The chances are memchached is not installed on the version of php you are using.

    In your case, you need to try the following,

    sudo apt install php7.2-memcached

    And reboot server.

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