thias/puppet-php — pull request #25 by Nyholm (2014-04-01 06:55:45+00:00)
Title: Added process.priority

You may now set a priority on a pool. With this feature you may have one low priority pool for background processes and a other pool with normal priority for your webpage visitors.

Here is a link to that feature request: https://bugs.php.net/bug.php?id=62160

This was added in PHP 5.4.4 if I'm not mistaken.