How to check memcached's capacity using php

Question

Not sure how to determine memcached's capacity (how full it is) using php. Can't seem to find any documentation on it either... Any ideas/suggestions?

Answer 1

Use getStats:

$m = new Memcached();
$m->addServer('localhost', 11211);

$stats = $m->getStats();
echo 'Capacity: ' . $stats['bytes'] . '/' . $stats['limit_maxbytes'] . ' Bytes';

Answer 2

I actually kept looking around - the more useful info can come from:

<?php
    $memcache_obj = new Memcache;
    $memcache_obj->addServer('memcache_host', 11211);
    $memcache_obj->addServer('failed_host', 11211);

    $stats = $memcache_obj->getExtendedStats('slabs');
    print_r($stats);
?>

This actually outputs more relevant info based on the way memcached allocates memory.