memcached

Introduction

What is memcached? Learn here!

You can have a dedicated memcached at your hosting account for your websites cache and other special needs.

The memcached will be a private daemon, and accessed through linux socket, so no others users will have access to your data.

You need a paid hosting plan to have access to this resources.

 

Create a cron job to start the memcached

 

Just insert this line at your cronjobs, inside cPanel, to run at every minute:

/usr/local/cpanel/3rdparty/bin/dmcached.sh >/dev/null 2>&1

 

To verify the statistics of your memcached, run this at your shell (ssh):

# /usr/local/cpanel/3rdparty/bin/dmcached.sh stats

 

The default memcached has 32MB of memory, if you need more, just add the memory parameter like this:

/usr/local/cpanel/3rdparty/bin/dmcached.sh 64 >/dev/null 2>&1

 

And stop the actual daemon, so the cron can start the new one with the new memory. At shell:

# /usr/local/cpanel/3rdparty/bin/dmcached.sh stop

 

How to use memcached with unix socket?

It is basicaly the same of network access, with other URL.

The URL will be:

unix:///home/REPLACE-YOUR-USER-HERE/.memcache/memcached.sock:0

At port, use:

0

 

For example, here is how to enable memcached at mediawiki LocalSettings.php:

// MEMCACHED
$wgMainCacheType = CACHE_MEMCACHED;
$wgParserCacheType = CACHE_MEMCACHED; # optional
$wgMessageCacheType = CACHE_MEMCACHED; # optional
$wgMemCachedServers = array("unix:///home/REPLACE-YOUR-USER-HERE/.memcache/memcached.sock:0");

$wgSessionsInObjectCache = true; # optional
$wgSessionCacheType = CACHE_MEMCACHED; # optional

 

How can I see my value of “REPLACE-YOUR-USER-HERE”?

At shell login (ssh) just enter: # pwd , and you will see /home/YOUR-USER-HERE

 

Why I cant access memcached at default URL?

The URL 127.0.0.1:11211 is insecure if used at shared hosting, because all users can read and write at same memcached servers and data.
Here you have a very secure solution: unix socket inside cloudLinux with cageFS.