#cd /usr/ports/databases/memcachedb
#make install clean

rc.conf:

memcachedb_enable="YES"

#/usr/local/etc/rc.d/memcachedb  start

#sockstat | grep 11211
nobody   memcachedb 70265 15 tcp4   127.0.0.1:11211       *:*
nobody   memcachedb 70265 16 udp4   127.0.0.1:11211       *:*

#cd  /usr/ports/databases/pecl-memcached  
#make install clean

#grep memcached  /usr/local/etc/php/extensions.ini 
extension=memcached.so

#/usr/local/etc/rc.d/php-fpm restart

/usr/local/etc/nginx/fastcgi_params:

fastcgi_param PHP_VALUE "session.save_handler=memcached\nsession.save_path=127.0.0.1:11211 enabled";

or php.ini:

session.save_handler =  memcached
session.save_path=127.0.0.1:11211 enabled

#/usr/local/etc/rc.d/nginx restart

check phpinfo():

     
session.save_handler memcached memcached
session.save_path 127.0.0.1:11211 enabled 127.0.0.1:11211 enabled 
#memstat --servers localhost
Server: localhost (11211)
         pid: 70265
         uptime: 2053
         time: 1371163073
         version: 1.2.0
         pointer_size: 64
         rusage_user: 0.094042
         rusage_system: 0.081473
         ibuffer_size: 512
         curr_connections: 5
         total_connections: 107
         connection_structures: 7
         cmd_get: 86
         cmd_set: 181
         get_hits: 85
         get_misses: 1
         bytes_read: 33199
         bytes_written: 25535
         threads: 4

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