Memcache won't flush or clear memory

Question

I\'ve been trying to clear my memcache as I\'m noticing the storage taking up almost 30% of server memory when using ps -aux.

So I ran the following php co

Answer 1

You need to wait atleast 1 second after clearing memcache. otherwise items added less than one second will invalidate itself.

Ex:

$memcache->flush();

$time = time()+1; //one second future
while(time() < $time) {
//sleep
}
$memcache->set('key', 'value'); // repopulate the cache 

Look at this post, memcache flush issue