Please note that after flushing, you have to wait a certain amount of time (in my case < 1s) to be able to write to Memcached again. If you don't, Memcached::set() will return 1, although your data is in fact not saved.
(PECL memcache >= 1.0.0)
Memcache::flush — Efface tous les éléments existant sur le serveur de cache
Memcache::flush() invalide immédiatement tous les éléments existant sur le serveur de cache. Memcache::flush() ne libère aucune ressource actuellement, il marque uniquement tous les éléments comme ayant expirés, donc la mémoire occupée sera réutilisée avec de nouveaux éléments. Vous pouvez également utiliser la fonction memcache_flush().
Cette fonction ne contient aucun paramètre.
Exemple #1 Exemple avec Memcache::flush()
<?php
/* API procédurale */
$memcache_obj = memcache_connect('memcache_host', 11211);
memcache_flush($memcache_obj);
/* API orientée objet */
$memcache_obj = new Memcache;
$memcache_obj->connect('memcache_host', 11211);
$memcache_obj->flush();
?>Please note that after flushing, you have to wait a certain amount of time (in my case < 1s) to be able to write to Memcached again. If you don't, Memcached::set() will return 1, although your data is in fact not saved.From the memcached mailing list:
"The flush has a one second granularity. The flush will expire all items up to the ones set within the same second."
It is imperative to wait at least one second after flush() command before further actions like repopulating the cache. Ohterwise new items < 1 second after flush() would be invalidatet instantaneous.
Example:
<?php
$memcache->flush();
$time = time()+1; //one second future
while(time() < $time) {
//sleep
}
$memcache->set('key', 'value'); // repopulate the cache
?>