Install Memcached on Gentoo Linux

Step 1 – Install

emerge --ask net-misc/memcached
rc-update add memcached default && rc-service memcached start

Step 2 – Configure (/etc/conf.d/memcached)

-l 127.0.0.1   # listen on localhost only
-m 256         # memory (MB)
-c 1024        # max connections
-t 4           # threads

Step 3 – Verify

echo "stats" | nc 127.0.0.1 11211

Step 4 – Basic operations

telnet 127.0.0.1 11211
set mykey 0 3600 5
hello
get mykey
quit

Step 5 – PHP client

$mc = new Memcached();
$mc->addServer('127.0.0.1', 11211);
$mc->set('key', 'value', 3600);
echo $mc->get('key');