Installing Memcache on RedHat or CentOS server

Memcache module provides handy procedural and object oriented interface to memcached, highly effective caching daemon, which was especially designed to decrease database load in dynamic web applications.

 

Login to Linux Server using root credentials. Use PuTTY/KiTTY to login.

 

Download and Install LibEvent

First make a folder named memcache to download the required setup files:

# mkdir memcache (make directory memcache)

# cd memcache (go to memcache directory)

Memcache requires LibEvent. Go to their site and get the latest version.

http://www.monkey.org/~provos/libevent-1.4.13-stable.tar.gz (Latest stable version)

OR

http://ftp.redhat.com/pub/redhat/rhel/beta/6/x86_64/os/Packages/libevent-1.4.13-1.el6.x86_64.rpm

 

# wget http://www.monkey.org/~provos/libevent-1.4.13-stable.tar.gz (download libevent latest stable version)

# tar xvfz libevent-1.4.13-stable.tar.gz (Unzip the zip file)

# cd libevent-1.4.13-stable (go to unzipped directory)

# ./configure (Configure)

# make (Compile the file to prepare for installation)

# make install (Run install process)

 

# cd

[To check if installed or not]

#whereis libevent

[Success will be shown with package path otherwise blank]

[To find certain package]

#find / -name  libevent-1.4.13-stable

[List files]

#ls

Download and Install Memcached

Now you can install Memcache. Again you should check their site for the latest version.

http://memcached.googlecode.com/files/memcached-1.4.4.tar.gz (Take the latest version)

[Added later:

http://memcached.googlecode.com/files/memcached-1.4.5.tar.gz as on June 2010 ]

 

# wget http://memcached.googlecode.com/files/memcached-1.4.4.tar.gz

# tar xvfz memcached-1.4.4.tar.gz

# cd memcached-1.4.4

# ./configure

# make

# make install

Starting Memcache

Run memcache as daemon (service start)
[ Syntax:  memcached -d -u [user] -m [memory size] -p [port] [listening IP]  ]
# memcached –d –m 1024 –u root –l 127.0.0.1 –p 11211
 

Try starting memcache.

memcached

If you get the following error then you may need to register libevent:

error while loading shared libraries: libevent-1.4.so.2: cannot open shared object file: No such file or directory

Register LibEvent

vi /etc/ld.so.conf.d/libevent-i386.conf

[Press i  to insert]
–[paste]–
/usr/local/lib/
[Save and exit: Press Esc -> Shift+; -> wq ->Enter ]

#ldconfig

  

Install zlib package

# wget http://www.zlib.net/zlib-1.2.5.tar.gz ( Go to http://www.zlib.net/ and take the latest version)
# tar xvfz zlib-1.2.5.tar.gz
# cd zlib-1.2.5
# ./configure
# make
# make install

Installing PHP Memcache

Install the PHP Memcache extension.

http://pecl.php.net/get/memcache-2.2.5.tgz

wget http://pecl.php.net/get/memcache-2.2.5.tgz
tar xvfz memcache-2.2.5.tgz
cd memcache-2.2.5
phpize     (phpize:Command not found case, run yum install php-devel then YES)

Again

phpize  (Now it should work with no error )

./configure –enable-memcache

make
make install

 

# cp modules/memcache.so /usr/lib64/php/modules/

[Path can be :   /usr/lib/php/modules/]

# vi /etc/php.d/memcached.ini

–paste–

extension=memcache.so

 

( See the phpinfo() and take  path Loaded Configuration File )

[ The path of php.ini file varies with hosting provider.  For  ukfast.co.uk  server,  /etc/php.ini ]
vi /usr/local/lib/php.ini
–[paste]–
extension=memcache.so
–[/paste]—
#service httpd restart

Or

# /etc/init.d/network restart

After Setup: Include the following code in the top of the  index page.


if(substr_count($_SERVER['HTTP_ACCEPT_ENCODING'], ‘gzip’)) ob_start(“ob_gzhandler”); else ob_start();

$memcache = new Memcache;

$memcache->connect(“localhost”,11211);

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3 Responses to “Installing Memcache on RedHat or CentOS server”

  1. Eric says:

    Thanks a bunch!
    New article too written last month.. So everything worked wonderful.
    (There is ton of ‘old’ tutorials on the web for this that dont work.)

    • Srikanta says:

      I followed the same procedure but it’s not working for me. I am getting the below warning -

      PHP Warning: PHP Startup: memcache: Unable to initialize module
      Module compiled with module API=20050922, debug=0, thread-safety=0
      PHP compiled with module API=20060613, debug=0, thread-safety=0
      These options need to match
      in Unknown on line 0
      PHP Warning: PHP Startup: memcache: Unable to initialize module
      Module compiled with module API=20050922, debug=0, thread-safety=0
      PHP compiled with module API=20060613, debug=0, thread-safety=0
      These options need to match
      in Unknown on line 0
      PHP 5.2.14 (cli) (built: Jul 25 2010 12:10:48)
      Copyright (c) 1997-2010 The PHP Group
      Zend Engine v2.2.0, Copyright (c) 1998-2010 Zend Technologies
      with Xdebug v2.1.2, Copyright (c) 2002-2011, by Derick Rethans

      Is there any way to get rid of it ?

  2. Valli says:

    Hi,
    I tried to install memcached from rpmforge repository but it was unsuccessful. So i tried this article and memcached got installed successfully.
    For some reasons, i want to uninstall memcached now. How can i uninstall this?

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