(PECL memcache >= 0.2.0)
Memcache::getStats — 获取服务器统计信息
$type
[, int $slabid
[, int $limit = 100
]]] )Memcache::getStats()返回一个关联数据的服务器统计信息。数组key是统计信息名， 值就是统计信息的值。同样你可以使用函数 memcache_get_stats()。
type
期望抓取的统计信息类型，可以使用的值有{reset, malloc, maps, cachedump, slabs, items, sizes}。 通过memcached协议指定这些附加参数是为了方便memcache开发者(检查其中的变动)。
slabid
用于与参数type联合从指定slab分块拷贝数据，cachedump命令会完全占用服务器通常用于
比较严格的调试。
limit
用于和参数type联合来设置cachedump时从服务端获取的实体条数。
返回关联数组表示的服务器统计信息 或者在失败时返回 FALSE
Amiangshu S. Bosu (2009-03-16 03:58:35)
Here is a memcache stats analyzer method that can be used to print memcache stats in a nice informative tabular format.
<?php
function printDetails($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());
?>
(2006-10-24 07:09:54)
The stats output from this function and what is output from the getExtendedStats() are identical except that getExtendedStats() provides information for all servers used.
mikael at synd dot info (2006-09-18 00:22:24)
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.