How To Setup Memcache Server on Fedora

Memcached is a distributed memory object caching system which stored data in memory on key-value basis. It is very useful for optimizing dynamic websites and enabled speed by caching objects in memory. Read more about memcache.

This article will help you to install Memcached on Fedora Linux systems.

Install Memcached on Fedora

Memcached is available under default Fedora repositories. You can install it by running the following command on your Fedora Linux system.

sudo dnf install memcached -y

Now start the Memcached service using the following commands.

sudo systemctl enable memcached.service 
sudo systemctl start memcached.service 

Memcached Configuration

Edit the Memcached default configuration file in your favorite text editor.

sudo vim /etc/sysconfig/memcached

and update the settings as per your system requirements. Here CACHESIZE is the max memory limit in Mb, which Memcached can use.

 PORT="11211"
 USER="memcached"
 MAXCONN="1024"
 CACHESIZE="64"
 OPTIONS=""

The above configuration shows that Memcached can use up to 64 Mb memory on the system.

After doing any changes, restart the Memcached server to apply changes.

sudo systemctl restart memcached.service

View Memcached Stats

You can view the service status using the systemctl command

sudo systemctl status memcached.service

You can also view the statics of the running Memcached service using “stats settings” command. Below is the example to send this command to the Memcached server and see the results.

echo "stats settings" | nc localhost 11211

STAT maxbytes 67108864
STAT maxconns 1024
STAT tcpport 11211
STAT udpport 11211
STAT inter 127.0.0.1
STAT verbosity 0
STAT oldest 0
STAT evictions on
STAT domain_socket NULL
STAT umask 700
STAT growth_factor 1.25
STAT chunk_size 48
STAT num_threads 4
STAT num_threads_per_udp 4
STAT stat_key_prefix :
STAT detail_enabled no
STAT reqs_per_event 20
STAT cas_enabled yes
STAT tcp_backlog 1024
STAT binding_protocol auto-negotiate
STAT auth_enabled_sasl no
STAT item_size_max 1048576
STAT maxconns_fast no
STAT hashpower_init 0
STAT slab_reassign no
STAT slab_automove 0
END

Install Memcache PHP Extension

You need to enable Memcache/Memcached PHP extension on your server to connect PHP with the Memcached service. There are basically two Memcache PHP modules available to install. One is named Memcache and the other Memcached. So install the module as per your uses.

sudo dnf install php-pecl-memcache 
sudo dnf install php-pecl-memcached 

After installation restarts the Apache service.

sudo systemctl restart httpd.service 

Now check if memcache php extension is enabled and working properly. Create a phpinfo.php file using following code

Now access http://server-ip-addr/phpinfo.php on the web browser and search for Memcache, You will see the results below.