Php/docs/mysql-xdevapi.configuration

From Get docs

Runtime Configuration

The behaviour of these functions is affected by settings in php.ini.

Mysql_xdevapi Configure Options
Name Default Changeable Changelog
xmysqlnd.collect_memory_statistics 0 PHP_INI_SYSTEM
xmysqlnd.collect_statistics 1 PHP_INI_ALL
xmysqlnd.debug   PHP_INI_SYSTEM
xmysqlnd.mempool_default_size 16000 PHP_INI_ALL
xmysqlnd.net_read_timeout 31536000 PHP_INI_SYSTEM
xmysqlnd.trace_alloc   PHP_INI_SYSTEM

Here's a short explanation of the configuration directives.

xmysqlnd.collect_memory_statistics int
xmysqlnd.collect_statistics int
xmysqlnd.debug string
xmysqlnd.mempool_default_size int
xmysqlnd.net_read_timeout int
xmysqlnd.trace_alloc string