Sunday, May 5, 2013

Memcached installation

1) Install memcached.

Enable rpmforge respository to install latest memcached rpm using yum.

For i386 / i686

rpm -Uhv

For x86_64

rpm -Uhv

Use yum to install memcached

yum -y install memcached

As soon as memcached installation completed, edit options for memcached in /etc/sysconfig/memcached to meet your need.

vi /etc/sysconfig/memcached

PORT=”11211″ #define on which port to urn

USER=”nobody” #same as apache user

MAXCONN=”1024″ #maximum number of connections allowed

CACHESIZE=”64″ #memory used for caching

OPTIONS=”" #use for any custom options

Save the file. All options can be seen by using following command

memcached -h

Start memcached

/etc/init.d/memcached start

Starting Distributed memory caching (memcached): [ OK ]

to check the running status of memcached

/etc/init.d/memcached status

memcached (pid 6475) is running…


netstat -anp | grep 11211

tcp 0 0 :::11211 :::* LISTEN 6475/memcached

udp 0 0* 6475/memcached

2) Install PHP Extension.

Download and install latest stable memcache version from PECL.

cd /usr/src


tar zxvf memcache-2.2.5.tgz

cd memcache-2.2.5




make install will be install in php modules directory, now enable extension in php.ini

To find out your php.ini location, execute following command

php -i | grep php.ini

Configuration File (php.ini) Path => /usr/local/lib

Loaded Configuration File => /usr/local/lib/php.ini

vi /usr/local/lib/php.ini

extension = “”

save the file and restart httpd server.

/etc/init.d/httpd restart

To check is memcache extension loaded in php, execute following command.

php -i | grep memcache


memcache support => enabled

memcache.allow_failover => 1 => 1

memcache.chunk_size => 8192 => 8192

memcache.default_port => 11211 => 11211

memcache.default_timeout_ms => 1000 => 1000

memcache.hash_function => crc32 => crc32

memcache.hash_strategy => standard => standard

memcache.max_failover_attempts => 20 => 20

Registered save handlers => files user sqlite memcache

PWD => /usr/src/memcache-2.2.5

_SERVER["PWD"] => /usr/src/memcache-2.2.5
_ENV["PWD"] => /usr/src/memcache-2.2.5

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