Install Memcached on Ubuntu 16.04

Memcached works to enhance performance by keeping a copy of commonly used script elements within the server’s memory in a form that is more easily read by the server thus reducing time. A bonus feature of this object cacher is its ability to decrease the number of connections to your database. In this tutorial, we instruct how to install Memcached, but it’s important to note that when using Memcache in an application, the application must be specially coded or configured to store and retrieve data this cached data.

Learn more about caching from our dedicated article or visit our series for database optimization.

Pre-flight

  • We are logged in as root on an Ubuntu 16.04 VPS powered by Liquid Web!
  • Installed and running Apache and PHP 7.

Installation of Memcached

Step 1:
Following best practices, we will do a quick package update by using the following command:
apt-get update
Step 2:
Install the Memcached daemon using
apt-get install memcached -y
Step 3:
Install the Memcache module for PHP fuctionality:
apt-get install php-memcached -y

Verify installation of Memcached

Use the php -m flag to show compiled modules while sorting through specifically looking for memcached.

php -m | grep memcached
memcached

Optional Configurations

At some point, you may find that you need to change the default settings of Memcached. These include adjusting the port number, memory for your cache, and the listening IP address.
vim /etc/memcached.conf

Adjust these configurations by keeping the same flags (-m, -p, -u, -l), adjusting the letter or number after the flag and save the file by typing :wq .
# Start with a cap of 64 megs of memory. It's reasonable, and the daemon default
# Note that the daemon will grow to this size, but does not start out holding this much
# memory
-m 64
 
# Default connection port is 11211
-p 11211
 
# Run the daemon as root. The start-memcached will default to running as root if no
# -u command is present in this config file
-u memcache
 
# Specify which IP address to listen on. The default is to listen on all IP addresses
# This parameter is one of the only security measures that memcached has, so make sure
# it's listening on a firewalled interface.
-l 127.0.0.1

 

Restart your Memcached service to recognize the changes to this file:
systemctl restart memcached

Configure Apache 2 to Control Browser Caching

Today we are configuring browser caching control on common Apache 2 servers. Caching is a great tool to reduce server resource consumption, bandwidth utilization and provide a faster end-user experience to visitors. To get familiar with caching concepts, simply review our ‘What is Caching?’ tutorial. Continue reading “Configure Apache 2 to Control Browser Caching”

Using W3 Total Cache on Cloud Sites

Cloud Sites has a unique infrastructure setup that requires specific settings for the page cache to provide the best experience for a given site. Please use these settings when you are configuring W3 Total Cache instead of any other settings. These directions will provide an optimized configuration for W3 Total Cache on the Cloud Sites platform. This article assumes you have already installed the W3 Total Cache plugin. Continue reading “Using W3 Total Cache on Cloud Sites”

How to Install the Memcached PHP Extension on Ubuntu 15.04

Memcached is a distributed, high-performance, in-memory caching system that is primarily used to speed up sites that make heavy use of databases. It can, however, be used to store objects of any kind. Nearly every popular CMS has a plugin or module to take advantage of Memcached, and many programming languages have a Memcached library, including PHP, Perl, Ruby, and Python. Memcached runs in memory and is thus quite speedy since it does not need to write data to disk.

Pre-Flight Check

  • These instructions are intended specifically for installing the Memcached PHP Extension on a single Ubuntu 15.04 node.
  • I’ll be working from a Liquid Web Core Managed Ubuntu 15.04 server, and I’ll be logged in as root.
  • Follow our tutorial on How to Install Memcached on Ubuntu 15.04 prior to this KB!

Continue reading “How to Install the Memcached PHP Extension on Ubuntu 15.04”

How to Install XCache on Ubuntu 15.04

Note:
Please note that this article is considered legacy documentation because Ubuntu 15.04 has reached its end-of-life support.

Pre-Flight Check

  • These instructions are intended specifically for installing XCache, an open-source opcode cacher, on Ubuntu 15.04.
  • I’ll be working from a Liquid Web Self Managed Ubuntu 15.04 server with Apache and PHP installed, and I’ll be logged in as non-root user. If you need more information then visit our tutorial on How to Add a User and Grant Root Privileges on Ubuntu 15.04.

Continue reading “How to Install XCache on Ubuntu 15.04”

How to Install Memcached on Ubuntu 15.04

Memcached is a distributed, high-performance, in-memory caching system that is primarily used to speed up sites that make heavy use of databases. It can however be used to store objects of any kind. Nearly every popular CMS has a plugin or module to take advantage of memcached, and many programming languages have a memcached library, including PHP, Perl, Ruby, and Python. Memcached runs in memory and is thus quite speedy, since it does not need to write data to disk.

Pre-Flight Check

  • These instructions are intended specifically for installing Memcached on a single Ubuntu 15.04 node.
  • I’ll be working from a Liquid Web Core Managed Ubuntu 15.04 server, and I’ll be logged in as root.

Continue reading “How to Install Memcached on Ubuntu 15.04”

What is Caching?

Caching Defined

Caching, as it pertains to hosting a website, is the temporary storage of content. This content could be images, files, bits of PHP scripts that are precompiled, HTML pages, results of database queries, and other web objects.

Why Use Caching?

Caching quickens the responsiveness of your website. You’ll also hear this concept referred to as: reducing latency, eliminating redundant processing steps, improving responsiveness, or reducing load times.

Continue reading “What is Caching?”

How to Install XCache on Ubuntu 14.04 LTS

Pre-Flight Check

  • These instructions are intended specifically for installing XCache, an open-source opcode cacher, on Ubuntu 14.04 LTS.
  • I’ll be working from a Liquid Web Core Managed Ubuntu 14.04 LTS server with Apache and PHP installed, and I’ll be logged in as non-root user. If you need more information then visit our tutorial on How to Add a User and Grant Root Privileges on Ubuntu 14.04 LTS.

Continue reading “How to Install XCache on Ubuntu 14.04 LTS”

How to Install XCache on Ubuntu 12.04 LTS

Note:
Please note that this article is considered legacy documentation because Ubuntu 12.04 has reached its end-of-life support.
Pre-Flight Check
  • These instructions are intended specifically for installing XCache, an open-source opcode cacher, on Ubuntu 12.04 LTS.
  • I’ll be working from a Liquid Web Core Managed Ubuntu 12.04 LTS server with Apache and PHP installed, and I’ll be logged in as non-root user. If you need more information then visit our tutorial on How to Add a User and Grant Root Privileges on Ubuntu 12.04 LTS.

Continue reading “How to Install XCache on Ubuntu 12.04 LTS”

How to Install XCache on Fedora 21

Note:
Please note that this article is considered legacy documentation because Fedora 21 has reached its end-of-life support.
Pre-Flight Check
  • These instructions are intended specifically for installing XCache, an open-source opcode cacher.
  • I’ll be working from a Liquid Web Self Managed Fedora 21 server with Apache and PHP installed, and I’ll be logged in as non-root user. If you need more information then visit our tutorial on How to Add a User and Grant Root Privileges on Fedora 21.

Continue reading “How to Install XCache on Fedora 21”