Installation
Persistent Connections
Mysqlnd
PHP Manual

## 実行時設定

php.ini の設定により動作が変化します。

MySQL Native Driver Configuration Options
Name | Default | Changeable | Changelog
--- | --- | --- | ---
mysqlnd.collect_statistics | "1" | PHP_INI_SYSTEM | Available since PHP 5.3.0.
mysqlnd.collect_memory_statistics | "0" | PHP_INI_SYSTEM | Available since PHP 5.3.0.

PHP_INI_* モードの詳細および定義については どこで設定を行うのか を参照してください。

以下に設定ディレクティブに関する 簡単な説明を示します。

`mysqlnd.collect_statistics` boolean

  Enables the collection of various client statistics which can be accessed through mysqli_get_client_stats(), mysqli_get_connection_stats(), mysqli_get_cache_stats() and are shown in mysqlnd section of the output of the phpinfo() function as well.

  This configuration setting enables all MySQL Native Driver statistics except those relating to memory management.

`mysqlnd.collect_memory_statistics` boolean

  Enable the collection of various memory statistics which can be accessed through mysqli_get_client_stats(), mysqli_get_connection_stats(), mysqli_get_cache_stats() and are shown in mysqlnd section of the output of the phpinfo() function as well.

  This configuration setting enables the memory management statistics within the overall set of MySQL Native Driver statistics.

Installation
Persistent Connections
Mysqlnd
PHP Manual