PHP Australia Conference 2015

Memcache::getStats

(PECL memcache >= 0.2.0)

Memcache::getStatsGet statistics of the server

Beschreibung

array Memcache::getStats ([ string $type [, int $slabid [, int $limit = 100 ]]] )

Memcache::getStats() returns an associative array with server's statistics. Array keys correspond to stats parameters and values to parameter's values. Also you can use memcache_get_stats() function.

Parameter-Liste

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.

R├╝ckgabewerte

Returns an associative array of server statisticsIm Fehlerfall wird FALSE zur├╝ckgegeben..

Siehe auch

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User Contributed Notes 3 notes

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7
mikael at synd dot info
8 years ago
pid                        Process id of this server process
uptime                    Number of seconds this server has been running
time                    Current UNIX time according to the server
version                    Version string of this server
rusage_user                Accumulated user time for this process
rusage_system            Accumulated system time for this process
curr_items                Current number of items stored by the server
total_items                Total number of items stored by this server ever since it started
bytes                    Current number of bytes used by this server to store items
curr_connections        Number of open connections
total_connections        Total number of connections opened since the server started running
connection_structures    Number of connection structures allocated by the server
cmd_get                    Cumulative number of retrieval requests
cmd_set                    Cumulative number of storage requests
get_hits                Number of keys that have been requested and found present
get_misses                Number of items that have been requested and not found
bytes_read                Total number of bytes read by this server from network
bytes_written            Total number of bytes sent by this server to network
limit_maxbytes            Number of bytes this server is allowed to use for storage.
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0
Amiangshu S. Bosu
5 years ago
Here is a memcache stats analyzer method that can be used to print memcache stats in a nice informative tabular format.

<?php

function printDetails($status){

echo
"<table border='1'>";

        echo
"<tr><td>Memcache Server version:</td><td> ".$status ["version"]."</td></tr>";
        echo
"<tr><td>Process id of this server process </td><td>".$status ["pid"]."</td></tr>";
        echo
"<tr><td>Number of seconds this server has been running </td><td>".$status ["uptime"]."</td></tr>";
        echo
"<tr><td>Accumulated user time for this process </td><td>".$status ["rusage_user"]." seconds</td></tr>";
        echo
"<tr><td>Accumulated system time for this process </td><td>".$status ["rusage_system"]." seconds</td></tr>";
        echo
"<tr><td>Total number of items stored by this server ever since it started </td><td>".$status ["total_items"]."</td></tr>";
        echo
"<tr><td>Number of open connections </td><td>".$status ["curr_connections"]."</td></tr>";
        echo
"<tr><td>Total number of connections opened since the server started running </td><td>".$status ["total_connections"]."</td></tr>";
        echo
"<tr><td>Number of connection structures allocated by the server </td><td>".$status ["connection_structures"]."</td></tr>";
        echo
"<tr><td>Cumulative number of retrieval requests </td><td>".$status ["cmd_get"]."</td></tr>";
        echo
"<tr><td> Cumulative number of storage requests </td><td>".$status ["cmd_set"]."</td></tr>";

       
$percCacheHit=((real)$status ["get_hits"]/ (real)$status ["cmd_get"] *100);
       
$percCacheHit=round($percCacheHit,3);
       
$percCacheMiss=100-$percCacheHit;

        echo
"<tr><td>Number of keys that have been requested and found present </td><td>".$status ["get_hits"]." ($percCacheHit%)</td></tr>";
        echo
"<tr><td>Number of items that have been requested and not found </td><td>".$status ["get_misses"]."($percCacheMiss%)</td></tr>";

       
$MBRead= (real)$status["bytes_read"]/(1024*1024);

        echo
"<tr><td>Total number of bytes read by this server from network </td><td>".$MBRead." Mega Bytes</td></tr>";
       
$MBWrite=(real) $status["bytes_written"]/(1024*1024) ;
        echo
"<tr><td>Total number of bytes sent by this server to network </td><td>".$MBWrite." Mega Bytes</td></tr>";
       
$MBSize=(real) $status["limit_maxbytes"]/(1024*1024) ;
        echo
"<tr><td>Number of bytes this server is allowed to use for storage.</td><td>".$MBSize." Mega Bytes</td></tr>";
        echo
"<tr><td>Number of valid items removed from cache to free memory for new items.</td><td>".$status ["evictions"]."</td></tr>";

echo
"</table>";

    }

?>

Sample usage:
<?php

  $memcache_obj
= new Memcache;
 
$memcache_obj->addServer('memcache_host', 11211);
  
printDetails($memcache_obj->getStats());
?>
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0
Anonymous
7 years ago
The stats output from this function and what is output from the getExtendedStats() are identical except that getExtendedStats() provides information for all servers used.
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