PHP Doku:: Flush all existing items at the server - memcache.flush.html

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Ein Service von Reinhard Neidl - Webprogrammierung.

The Memcache class

<<Memcache::delete

Memcache::get>>

Memcache::flush

(PECL memcache >= 1.0.0)

Memcache::flushFlush all existing items at the server

Beschreibung

bool Memcache::flush ( void )

Memcache::flush() immediately invalidates all existing items. Memcache::flush() doesn't actually free any resources, it only marks all the items as expired, so occupied memory will be overwritten by new items. Also you can use memcache_flush() function.

Rückgabewerte

Gibt bei Erfolg TRUE zurück. Im Fehlerfall wird FALSE zurückgegeben.

Beispiele

Beispiel #1 Memcache::flush() example

<?php

/* procedural API */
$memcache_obj memcache_connect('memcache_host'11211);

memcache_flush($memcache_obj);

/* OO API */

$memcache_obj = new Memcache;
$memcache_obj->connect('memcache_host'11211);

$memcache_obj->flush();

?>


2 BenutzerBeiträge:
- Beiträge aktualisieren...
Anonymous
27.02.2008 16:51
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
?>
maarten d/ot manders a/t tilllate dotcom
12.07.2007 10:20
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.



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