Memcache::getExtendedStats

(PECL memcache >= 2.0.0)

Memcache::getExtendedStats — Get statistics from all servers in pool

Description

Memcache::getExtendedStats(string $type = ?, int $slabid = ?, int $limit = 100): array

Memcache::getExtendedStats() returns a two-dimensional associative array with server statistics. Array keys correspond to host:port of server and values contain the individual server statistics. A failed server will have its corresponding entry set to false. You can also use the memcache_get_extended_stats() function.

Note:
This function has been added to Memcache version 2.0.0.

Parameters

type: The type of statistics to fetch. Valid values are {reset, malloc, maps, cachedump, slabs, items, sizes}. According to the memcached protocol spec these additional arguments "are subject to change for the convenience of memcache developers".
slabid: Used in conjunction with type set to cachedump to identify the slab to dump from. The cachedump command ties up the server and is strictly to be used for debugging purposes.
limit: Used in conjunction with type set to cachedump to limit the number of entries to dump.

Warning

The cachedump stat type has been removed from the memcached daemon due to security reasons.

Return Values

Returns a two-dimensional associative array of server statistics or false on failure.

Examples

Example #1 Memcache::getExtendedStats() example

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

The above example will output:

Array
(
    [memcache_host:11211] => Array
        (
            [pid] => 3756
            [uptime] => 603011
            [time] => 1133810435
            [version] => 1.1.12
            [rusage_user] => 0.451931
            [rusage_system] => 0.634903
            [curr_items] => 2483
            [total_items] => 3079
            [bytes] => 2718136
            [curr_connections] => 2
            [total_connections] => 807
            [connection_structures] => 13
            [cmd_get] => 9748
            [cmd_set] => 3096
            [get_hits] => 5976
            [get_misses] => 3772
            [bytes_read] => 3448968
            [bytes_written] => 2318883
            [limit_maxbytes] => 33554432
        )

    [failed_host:11211] => false
)

User Contributed Notes 5 notes

down

manmca dot 2280 at gmail dot com ¶

14 years ago


Get lists of all the keys stored in memcache server....



<?php

/**

 * Function to get all memcache keys

 * @author Manish Patel

 * @Created:  28-May-2010  

 */

function getMemcacheKeys() {



    $memcache = new Memcache;

    $memcache->connect('127.0.0.1', 11211) or die ("Could not connect to memcache server");



    $list = array();

    $allSlabs = $memcache->getExtendedStats('slabs');

    $items = $memcache->getExtendedStats('items');

    foreach($allSlabs as $server => $slabs) {

        foreach($slabs AS $slabId => $slabMeta) {

           $cdump = $memcache->getExtendedStats('cachedump',(int)$slabId);

            foreach($cdump AS $keys => $arrVal) {

                foreach($arrVal AS $k => $v) {                    

                    echo $k .'<br>';

                }

           }

        }

    }    

}//EO getMemcacheKeys()

?>



Hope it helps....

down

oushunbao at 163 dot com ¶

13 years ago


Get lists of all the keys stored in memcache server....

<?php
/**
 * Function to get all memcache keys
 * @author Manish Patel
 * @Created:  28-May-2010
 * @modified: 16-Jun-2011 
 */
function getMemcacheKeys() {

    $memcache = new Memcache;
    $memcache->connect('127.0.0.1', 11211) or die ("Could not connect to memcache server");

    $list = array();
    $allSlabs = $memcache->getExtendedStats('slabs');
    $items = $memcache->getExtendedStats('items');
    foreach($allSlabs as $server => $slabs) {
        foreach($slabs AS $slabId => $slabMeta) {
           $cdump = $memcache->getExtendedStats('cachedump',(int)$slabId);
            foreach($cdump AS $keys => $arrVal) {
                if (!is_array($arrVal)) continue;
                foreach($arrVal AS $k => $v) {                   
                    echo $k .'<br>';
                }
           }
        }
    }   
}//EO getMemcacheKeys()
?>

copy from up, but fix a warning
i only add one line:  if (!is_array($arrVal)) continue;

down

Anonymous ¶

6 years ago


the latest updated version:

function getMemcacheKeys() {

    $memcache = new Memcache;
    $memcache->connect('127.0.0.1', 11211) or die ("Could not connect to memcache server");

    $list = array();
    $allSlabs = $memcache->getExtendedStats('slabs');
    foreach($allSlabs as $server => $slabs) {
        foreach($slabs AS $slabId => $slabMeta) {
           if (!is_int($slabId)) { continue; }
           $cdump = $memcache->getExtendedStats('cachedump',(int)$slabId);
            foreach($cdump AS $keys => $arrVal) {
                if (!is_array($arrVal)) continue;
                foreach($arrVal AS $k => $v) {                   
                    $list[] =  $k;
                }
           }
        }
    } 
    return $list;  
}

down

jcastromail at yahoo dot es ¶

7 years ago


" The cachedump stat type has been removed from the memcached daemon due to security reasons. "

To the date, the version 1.4.5_4_gaa7839e (windows 64bits) still supports the command cachedump that its highly important to returns the keys stored.

down

eithed at gmail ¶

8 years ago


In response to manmca dot 2280 at gmail dot com

This function makes the memcached read only, at least with the most recent version of PECL memcache (3.0.8) and most recent version of memcache (1.4.21), so if you're relying on this to overwrite / remove only certain keys you're in for a nasty suprise

add a note

Memcache::getExtendedStats

Description

Parameters

Return Values

Examples

See Also

User Contributed Notes 5 notes