Memcache::getStats

(PECL memcache >= 0.2.0)

Memcache::getStats — サーバーの統計情報を取得する

説明

Memcache::getStats(string $type = ?, int $slabid = ?, int $limit = 100): array|false

Memcache::getStats() は、サーバーの統計情報を含む連想配列を返します。配列のキーが統計情報パラメータの名前、そして配列の値がパラメータの値に対応します。 memcache_get_stats() 関数を使用することも可能です。

パラメータ

type: 取得する統計情報の型。使用可能な値は {reset, malloc, maps, cachedump, slabs, items, sizes} のいずれかです。 memcached プロトコルの仕様によると、これらの追加の引数は「memcache の開発者の都合により、変更される可能性があります」ということです。
slabid: type を cachedump と設定した場合に使用し、ダンプを取得する slab を指定します。 cachedump コマンドはサーバーと結びついており、デバッグ目的でのみ使用します。
limit: type を cachedump と設定した場合に使用し、ダンプするエントリの数を制限します。

戻り値

サーバーの統計情報を含む連想配列を返します。失敗した場合に false を返します。

参考

Memcache::getVersion() - サーバーのバージョンを返す
Memcache::getExtendedStats() - プール内のすべてのサーバーの統計情報を取得する

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User Contributed Notes 3 notes

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mikael at synd dot info ¶

17 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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Amiangshu S. Bosu ¶

15 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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Anonymous ¶

17 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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