Memcache::getStats
(PECL memcache >= 0.2.0)
Memcache::getStats — Get statistics of the server
Description
$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.
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
typeset 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
typeset to cachedump to limit the number of entries to dump.
Return Values
Returns an associative array of server statistics or FALSE on failure.
See Also
- Memcache::getVersion() - Return version of the server
- Memcache::getExtendedStats() - Get statistics from all servers in pool
- Функция Memcache::add() - Add an item to the server
- Функция Memcache::addServer() - Add a memcached server to connection pool
- Функция Memcache::close() - Close memcached server connection
- Функция Memcache::connect() - Open memcached server connection
- Функция Memcache::decrement() - Decrement item's value
- Функция Memcache::delete() - Delete item from the server
- Функция Memcache::flush() - Flush all existing items at the server
- Функция Memcache::get() - Retrieve item from the server
- Функция Memcache::getExtendedStats() - Get statistics from all servers in pool
- Функция Memcache::getServerStatus() - Returns server status
- Функция Memcache::getStats() - Get statistics of the server
- Функция Memcache::getVersion() - Return version of the server
- Функция Memcache::increment() - Increment item's value
- Функция Memcache::pconnect() - Open memcached server persistent connection
- Функция Memcache::replace() - Replace value of the existing item
- Функция Memcache::set() - Store data at the server
- Функция Memcache::setCompressThreshold() - Enable automatic compression of large values
- Функция Memcache::setServerParams() - Changes server parameters and status at runtime
Коментарии
pid Process id of this server processuptime 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.
The stats output from this function and what is output from the getExtendedStats() are identical except that getExtendedStats() provides information for all servers used.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());
?>
Official up to date Memcached explanation of stats command output on the github page:
https://github.com/memcached/memcached/blob/master/doc/protocol.txt
Please check you current version